Christopher Scott Walker

Works (25)

Updated: April 5th, 2024 09:26

2022 article

Multiregion transcriptomic profiling of the primate brain reveals signatures of aging and the social environment

Chiou, K. L., DeCasien, A. R., Rees, K. P., Testard, C., Spurrell, C. H., Gogate, A. A., … Snyder-Mackler, N. (2022, November 24). NATURE NEUROSCIENCE.

By: K. Chiou*, A. DeCasien, K. Rees, C. Testard, C. Spurrell, A. Gogate, H. Pliner, S. Tremblay ...

MeSH headings : Female; Male; Humans; Animals; Neurodegenerative Diseases; Macaca mulatta; Transcriptome; Aging / genetics; Social Environment; Solitary Nucleus
TL;DR: It is demonstrated that age-related changes in the level and variance of gene expression occur in genes associated with neural functions and neurological diseases, including Alzheimer’s disease, and shown that higher social status in females is associated with younger relative transcriptional ages, providing a link between the social environment and aging in the brain. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: December 12, 2022

2022 journal article

Social connections predict brain structure in a multidimensional free-ranging primate society

SCIENCE ADVANCES, 8(15).

MeSH headings : Animals; Brain / diagnostic imaging; Humans; Macaca mulatta; Social Behavior; Temporal Lobe
TL;DR: It is demonstrated that the size of specific brain structures varies with the number of direct affiliative social connections and suggested that this relationship may arise during development, and proposed links between social network size, biological success, and the expansion of specificbrain circuits are reinforced. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
16. Peace, Justice and Strong Institutions (OpenAlex)
Source: Web Of Science
Added: May 10, 2022

2022 article

The immature Homo naledi ilium from the Lesedi Chamber, Rising Star Cave, South Africa

Cofran, Z., VanSickle, C., Valenzuela, R., Garcia-Martinez, D., Walker, C. S., Hawks, J., … Berger, L. R. (2022, April 16). AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY.

author keywords: Australopithecus; Dinaledi; Makapansgat; os coxae; pelvis
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: May 2, 2022

2021 article

Evaluating bony predictors of bite force across the order Carnivora

Dickinson, E., Davis, J. S., Deutsch, A. R., Patel, D., Nijhawan, A., Patel, M., … Hartstone-Rose, A. (2021, August 6). JOURNAL OF MORPHOLOGY, Vol. 8.

By: E. Dickinson n, J. Davis*, A. Deutsch n, D. Patel n, A. Nijhawan n, M. Patel n, A. Blume n, J. Gannon* ...

author keywords: bony correlates; entheses; masseter; PCSA; temporalis
MeSH headings : Animals; Biomechanical Phenomena; Bite Force; Carnivora; Diet; Masseter Muscle; Masticatory Muscles
TL;DR: This study compares three cranial osteological techniques for estimating muscle size against dissection-derived muscle weights and physiological cross-sectional area within the jaw adductor musculature of 40 carnivoran taxa spanning eight families, four orders of magnitude in body size, and the full dietary spectrum of the order. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 23, 2021

2021 journal article

Internal structural properties of the humeral diaphyses in an early modern human from Tianyuan Cave, China

QUATERNARY INTERNATIONAL, 591, 107–118.

author keywords: Diaphyseal cortical thickness; Bone rigidity; Morphometric mapping; Upper limb; Late pleistocene; East asia
TL;DR: It is shown that upper limb internal structures can provide important information for inferring the behavior of ancient hominins, and the bilateral asymmetry of the right and left humeri may be more informative for discriminating between fossil and modern human samples than cortical thickness or rigidity values in only one side. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: June 10, 2021

2021 journal article

Sociality predicts individual variation in the immunity of free-ranging rhesus macaques

PHYSIOLOGY & BEHAVIOR, 241.

By: M. Pavez-Fox*, J. Negron-Del Valle*, I. Thompson n, C. Walker n, S. Bauman, O. Gonzalez*, N. Compo, A. Ruiz-Lambides ...

author keywords: Sociality; Health; Immunity; Social networks; Rhesus macaques
MeSH headings : Animals; Grooming; Macaca mulatta; Social Behavior; Social Environment
TL;DR: Knowing of the relationship between sociality and the immune system in humans and captive animals to free-ranging primates is extended to primates, demonstrating generalizability of the beneficial role of social integration on health. (via Semantic Scholar)
UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: October 4, 2021

2020 journal article

Effect of Poly(vinyl butyral) Comonomer Sequence on Adhesion to Amorphous Silica: A Coarse-Grained Molecular Dynamics Study

ACS APPLIED MATERIALS & INTERFACES, 12(42), 47879–47890.

By: C. Walker n, J. Genzer n & E. Santiso n

author keywords: polymer adsorption; silica; copolymer sequences; coarse-graining; molecular dynamics
TL;DR: An unexpectedly complex relationship between blockiness parameter and adhesion energy is discovered for intermediate vinyl alcohol (VA) content; adhesion strength to the silica slab was found to be maximal not for diblockCopolymers, but rather random-blocky copolymers with a moderately high degree of blockiness. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: December 21, 2020

2020 journal article

Extending the fused-sphere SAFT-gamma Mie force field parameterization approach to poly(vinyl butyral) copolymers

JOURNAL OF CHEMICAL PHYSICS, 152(4).

By: C. Walker n, J. Genzer n & E. Santiso n

TL;DR: This study explores the application of the fused-sphere SAFT-γ Mie approach to copolymers and demonstrates its capabilities at modeling poly(vinyl alcohol-co-vinyl butyral) (PVB), an important commercial copolymer widely used as an interlayer in laminated safety glass applications. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 6, 2020

2020 journal article

Predicting body mass of bonobos (Pan paniscus) with human-based morphometric equations

AMERICAN JOURNAL OF PRIMATOLOGY, 82(2).

By: G. Yapuncich n, A. Bowie*, R. Belais*, S. Churchill* & C. Walker n

author keywords: allometry; bi-iliac breadth; body size; hominin; panel regression; stature
MeSH headings : Animals; Anthropometry / methods; Body Weight; Democratic Republic of the Congo; Female; Hominidae; Male; Pan paniscus / physiology
TL;DR: It is found that the novel equation predicts bonobo body mass most accurately overall (41 of 56 bonobos predicted within 20% of their observed body mass) and the novel BMPE is particularly accurate between 25 and 45 kg. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: February 3, 2020

2019 journal article

Development of a fused-sphere SAFT-gamma Mie force field for poly(vinyl alcohol) and poly(ethylene)

JOURNAL OF CHEMICAL PHYSICS, 150(3).

By: C. Walker n, J. Genzer n & E. Santiso n

TL;DR: This work addresses two key issues in extending the SAFT-γ Mie coarse-graining methodology to polymers, including the treatment of polymer chain rigidity and the disparity between the structure of linear chains of tangent spheres and the structures of the real polymers. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: February 11, 2019

2019 journal article

Femoral neck and shaft structure in Homo naledi from the Dinaledi Chamber (Rising Star System, South Africa)

JOURNAL OF HUMAN EVOLUTION, 133, 61–77.

By: L. Friedl*, A. Claxton*, C. Walker n, S. Churchill*, T. Holliday*, J. Hawks*, L. Berger*, J. DeSilva*, D. Marchi*

author keywords: Cross-sectional geometry; Lower limb; Bipedal locomotion; Middle Pleistocene
MeSH headings : Animals; Bone Density; Diaphyses / anatomy & histology; Diaphyses / physiology; Femur / anatomy & histology; Femur / physiology; Femur Neck / anatomy & histology; Femur Neck / physiology; Fossils / anatomy & histology; Hominidae / anatomy & histology; Hominidae / physiology; South Africa
TL;DR: H. naledi shows a unique combination of characteristics in its femur that undoubtedly indicate a species committed to terrestrial bipedalism but with a unique loading pattern of the femur possibly consequence of the unique postcranial anatomy of the species. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
14. Life Below Water (OpenAlex)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: September 3, 2019

2019 journal article

Molecular simulation of polymers with a SAFT-gamma Mie approach

MOLECULAR SIMULATION, 45(14-15), 1223–1241.

By: A. Pervaje n, C. Walker n & E. Santiso n

author keywords: Polymers; molecular dynamics; SAFT-gamma Mie; equations of state; force fields
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: September 3, 2019

2019 journal article

Morphology of the Homo naledi femora from Lesedi

AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 170(1), 5–23.

By: C. Walker n, Z. Cofran*, M. Grabowski*, D. Marchi*, R. Cook n, S. Churchill*, K. Tommy*, Z. Throckmorton* ...

author keywords: bipedal locomotion; hominin; Rising Star; thigh
MeSH headings : Animals; Anthropology, Physical; Biological Evolution; Femur / anatomy & histology; Femur / physiology; Fossils; Hominidae / anatomy & histology; Hominidae / physiology; Humans; South Africa; Walking / physiology
TL;DR: The Lesedi femora increase the range of variation of femoral morphology in H. naledi by preserving anatomy previously unidentified or unconfirmed in the species, including an anteroposteriorly expanded midshaft and anteriorly expanded patellar surface. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: September 3, 2019

2018 journal article

Maturation is prolonged and variable in female chimpanzees

JOURNAL OF HUMAN EVOLUTION, 114, 131–140.

By: K. Walker n, C. Walker n, J. Goodall* & A. Pusey*

author keywords: Life history; First birth; Sexual maturity; Hominin; Dispersal; Maternal effects
MeSH headings : Animals; Female; Models, Biological; Pan troglodytes / growth & development; Sexual Maturation; Tanzania
TL;DR: Improved estimates of maturation milestones in a population of wild female chimpanzees are provided and the importance of maternal factors in development is indicated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Morphological Identification of Hair Recovered from Feces for Detection of Cannibalism in Eastern Chimpanzees

FOLIA PRIMATOLOGICA, 89(3-4), 240–250.

By: C. Walker n, K. Walker*, G. Paulo* & A. Pusey*

author keywords: Microscopy; Forensics; Guard hair; Infanticide; Pan troglodytes
MeSH headings : Animals; Cannibalism; Feces; Hair / anatomy & histology; Pan troglodytes / anatomy & histology; Pan troglodytes / physiology; Tanzania
TL;DR: It is found that chimpanzee guard hair morphology is unique among tested mammals and that the presence of abundant chimpanzee hair in feces is likely the result of cannibalism and not incidental ingestion from grooming or other means, and morphological analysis of guard hairs from feces is a promising, cost-effective tool for the determination of cannibalistic acts in chimpanzees. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Morphometric panel regression equations for predicting body mass in immature humans

AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 166(1), 179–195.

By: G. Yapuncich n, S. Churchill*, N. Cameron* & C. Walker n

author keywords: bi-iliac breadth; children; juveniles; stature
MeSH headings : Adolescent; Anthropometry / methods; Body Height; Body Mass Index; Body Weight / physiology; Child; Child, Preschool; Female; Humans; Ilium / anatomy & histology; Male; Models, Statistical
TL;DR: Two novel body mass prediction equations derived from 3468 observations of stature and bi-iliac breadth from a large sample of immature humans collected in the Harpenden Growth Study generate very accurate body mass predictions across both sexes and all age classes of the test sample. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Dental development in Homo naledi

BIOLOGY LETTERS, 13(8).

By: Z. Cofran* & C. Walker n

author keywords: hominin; teeth; tooth eruption; life history; ontogeny
MeSH headings : Animals; Biological Evolution; Fossils; Hominidae; Odontogenesis; Pan troglodytes; Tooth
TL;DR: Tooth formation and eruption in two developing dentitions of Homo naledi, a late-surviving, morphologically mosaic hominin species, indicates a recent emergence of the human developmental pattern and investigates the relationship between dental development and other variables associated with life history. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Evaluating morphometric body mass prediction equations with a juvenile human test sample: accuracy and applicability to small-bodied hominins

Journal of Human Evolution, 115, 65–77.

By: C. Walker n, G. Yapuncich*, S. Sridhar*, N. Cameron* & S. Churchill*

author keywords: Children; Australopithecus; Homo; Body size; Stature; Bi-iliac breadth
MeSH headings : Animals; Anthropology, Physical / methods; Body Weight; Child; Female; Hominidae / physiology; Humans; Male
TL;DR: Because morphometric equations are reasonably accurate when applied to this juvenile test sample, it is argued these equations may be used to predict body mass in small-bodied hominins, despite the potential for some error induced by differing body proportions and/or extrapolation beyond the original reference sample range. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

New fossil remains of Homo naledi from the Lesedi Chamber, South Africa

Elife, 6.

MeSH headings : Animals; Caves; Fossils; Hominidae; South Africa
TL;DR: The Lesedi Chamber skeletal sample extends the knowledge of the morphology and variation of H. naledi, and evidence from both recovery localities shows a consistent pattern of differentiation from other hominin species. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

The thigh and leg of Homo naledi

JOURNAL OF HUMAN EVOLUTION, 104, 174–204.

author keywords: Bipedal locomotion; Femur; Patella; Tibia; Fibula; South Africa Rising Star
MeSH headings : Animals; Biological Evolution; Fossils / anatomy & histology; Hominidae / anatomy & histology; Leg Bones / anatomy & histology; South Africa
TL;DR: The mosaic morphology of the H. naledi thigh and leg appears most consistent with a species intermediate between Australopithecus spp. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
14. Life Below Water (OpenAlex)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

The upper limb of Homo naledi

JOURNAL OF HUMAN EVOLUTION, 104, 155–173.

By: E. Feuerriegel*, D. Green*, C. Walker n, P. Schmid*, J. Hawks*, L. Berger*, S. Churchill*

author keywords: Scapula; Clavicle; Humerus; Humeral torsion; Hominin; Rising Star
MeSH headings : Animals; Arm Bones / anatomy & histology; Biological Evolution; Fossils / anatomy & histology; Hominidae / anatomy & histology; South Africa
TL;DR: The H. naledi upper limb is markedly primitive, retaining morphology conducive to climbing while lacking many of the derived features related to effective throwing or running purported to characterize other members of early Homo. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Home-Range Size in Large-Bodied Carnivores as a Model for Predicting Neandertal Territory Size

EVOLUTIONARY ANTHROPOLOGY, 25(3), 117–123.

By: S. Churchill, C. Walker* & A. Schwartz

author keywords: mobility; Pleistocene; Mousterian; Micoquian
MeSH headings : Animals; Anthropology, Physical; History, Ancient; Homing Behavior / physiology; Models, Biological; Neanderthals / physiology; Wolves / physiology
TL;DR: It is shown that Neandertals had stocky, short‐limbed physiques that were energetically costly to move and lived in relatively unproductive Pleistocene environments that may have required greater movement to deal with problems of biodepletion and resource patchiness. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Homo naledi, a new species of the genus Homo from the Dinaledi Chamber, South Africa

ELife, 4.

MeSH headings : Animals; Anthropometry; Hominidae / anatomy & histology; Hominidae / classification; Humans; Phylogeny; South Africa
TL;DR: Homo naledi is a previously-unknown species of extinct hominin discovered within the Dinaledi Chamber of the Rising Star cave system, Cradle of Humankind, South Africa, characterized by body mass and stature similar to small-bodied human populations but a small endocranial volume similar to australopiths. (via Semantic Scholar)
Source: Crossref
Added: July 27, 2019

2014 chapter

Territory size in Canis lupus: implications for Neandertal mobility

In K. Carlson & D. Marchi (Eds.), Reconstructing mobility: environmental, behavioral, and morphological determinants. New York: Springer.

By: C. Walker & S. Churchill

Ed(s): K. Carlson & D. Marchi

Source: NC State University Libraries
Added: July 28, 2019

2013 journal article

The Lower Limb and Mechanics of Walking in Australopithecus sediba

Science, 340(6129), 1232999–1232999.

MeSH headings : Animals; Biomechanical Phenomena; Bones of Lower Extremity / anatomy & histology; Bones of Lower Extremity / physiology; Female; Foot / anatomy & histology; Foot / physiology; Foot Joints / physiology; Fossils; Gait; Hominidae / anatomy & histology; Hominidae / physiology; Leg / anatomy & histology; Leg / physiology; Lower Extremity / anatomy & histology; Lower Extremity / physiology; Male; Pronation; South Africa; Walking
TL;DR: The lower limb anatomy of Au. (via Semantic Scholar)
Source: Crossref
Added: July 27, 2019

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