Primate Behavior and Ecology

Infant spatial relationships with adult males in a wild primate: males as mitigators or magnifiers of intergenerational effects of early adversity?

The paper examines how adult male primates influence infant behavior and proximity, showing that maternal early adversity affects infant-male interactions.

Species -Shared and -Unique Gyral Peaks on Human and Macaque Brains

This study identifies shared and unique gyral peaks in human and macaque brains and examines their spatial distribution, anatomical morphology, and functional connectivity.

Problem-Solving as a Language: A Computational Lens into Human and Monkey Intelligence

This study introduces a language model framework to analyze problem-solving behavior in humans and monkeys, revealing differences in complexity and evolution of their problem-solving strategies.

Development of a Marmoset Apparatus for Automated Pulling (MarmoAAP) to Study Cooperative Behaviors

The paper introduces MarmoAAP, a novel apparatus for studying cooperative behaviors in common marmosets, enabling high-throughput behavioral data collection and integration with video/audio for detailed analysis.

Head movement allocation in freely-moving macaques learning object-context sequences

This study examines how freely-moving macaques allocate head movements during learning and memory-guided decision-making in a complex 3D environment using recurrent neural networks.

Anterior cingulate cortex neurons in macaques encode social image identities

The paper shows that ACCg neurons in macaques encode social image identities more than nonsocial ones, even when identity is irrelevant to the task.

Mixed Multi-Level Visual, Reward, and Motor Signals in Dorsomedial Frontal Cortex Area F7 during Active Naturalistic Video Exploration

This study identifies mixed signals in macaque F7 neurons during video exploration, showing integration of visual, reward, and motor information.

Neural signatures of natural behavior in socializing macaques

This study identifies neural signatures of natural social behaviors in rhesus macaques using wireless recordings and ethological analysis, revealing how social interactions are encoded in brain activity.

Sulcal morphology of posteromedial cortex substantially differs between humans and chimpanzees

The paper compares sulcal morphology in the human and chimpanzee posteromedial cortex, identifying species differences in sulcus incidence, depth, and surface area.

The Japan Monkey Centre Primates Brain Imaging Repository of high-resolution postmortem magnetic resonance imaging: the second phase of the archive of digital records

The paper introduces a second phase of a brain imaging repository for nonhuman primates, providing high-resolution MRI data from nine species to support comparative neuroscience research and conservation.

Human and macaque pairs employ different coordination strategies in a transparent decision game

This study compares coordination strategies in human and macaque pairs during a transparent decision game, finding that humans use dynamic turn-taking while macaques use static coordination, with one trained macaque pair showing dynamic behavior.

Formal cooperation in macaque monkeys obtained via single-payoff change from formal coordination games

This study shows macaque monkeys can cooperate in iterated Prisoner's Dilemma games after being exposed to coordination games, with cooperation decreasing as temptation payoffs increase.

Multimodal cues displayed by submissive rats promote prosocial choices by dominants

This study shows that submissive rats' multimodal cues increase prosocial choices by dominant rats in a reward-sharing task.

Defining tertiary sulci in lateral prefrontal cortex in chimpanzees using human predictions

The paper defines tertiary sulci in chimpanzee lateral prefrontal cortex using human predictions and finds differences in sulcal morphology between chimpanzees and humans.

Behavioral context affects social signal representations within single primate prefrontal cortex neurons

The paper shows that neural responses to social vocalizations in marmoset prefrontal cortex vary across different behavioral contexts, indicating flexible representations of social signals.

Distinct gene regulatory signatures of dominance rank and social bond strength in wild baboons

This study identifies gene regulatory differences linked to dominance rank and social bond strength in wild baboons, showing sex-specific effects and distinct immune responses to social factors.

Agonism and grooming behavior explain social status effects on physiology and gene regulation in rhesus macaques

The paper investigates how social status in rhesus macaques affects gene regulation, glucocorticoid physiology, and mitochondrial DNA phenotypes through specific behavioral interactions.

Simultaneous functional MRI of socially interacting marmosets

This paper introduces a method to simultaneously measure whole-brain activation in two socially interacting marmoset monkeys using functional MRI and finds neuronal synchrony in brain regions involved in social processing.

Signatures of adaptive evolution in platyrrhine primate genomes

This study identifies candidate genes under selection in cebid primates, revealing evolutionary pressures on brain development and other traits across their evolutionary history.

Corpus callosum morphology across the lifespan in baboons (Papio anubis): a cross-sectional study of relative mid-sagittal surface area and thickness

This study examines corpus callosum morphology in baboons across their lifespan, finding no age-related atrophy in old age, similar to other non-human primates.

Cutting across structural and transcriptomic scales translates time across the lifespan and resolves frontal cortex development in human evolution

The paper determines corresponding ages between humans and chimpanzees across the lifespan and finds that prefrontal cortex maturation timelines are not unusually extended in humans.

Chimpanzee Brain Morphometry Utilizing Standardized MRI Preprocessing and Macroanatomical Annotations

This study develops a chimpanzee brain reference template and processing pipeline to analyze structural MRI data, revealing age-related GM atrophy and hemispheric asymmetry patterns.

A platform for semi-automated voluntary training of common marmosets for behavioral neuroscience

This paper introduces a semi-automated platform for training common marmosets in-home for behavioral neuroscience studies, enabling naturalistic behavior analysis with minimal experimenter intervention.

Sulcal organization in the medial frontal cortex reveals insights into primate brain evolution

The paper examines sulcal morphology in the medial frontal cortex of primates to reveal evolutionary patterns and challenge previous assumptions about human uniqueness.

Evolution of neocortical folding: A phylogenetic comparative analysis of MRI from 34 primate species

This study analyzes MRI data from 34 primate species to investigate the evolution of neocortical folding, finding a Brownian Motion model best fits the data and a stable fold wavelength across varying brain sizes.

Neuronal distribution across the cerebral cortex of the marmoset monkey (Callithrix jacchus)

The paper quantifies neuronal density and distribution across the marmoset cortex, revealing regional and laminar variations and their potential functional and developmental implications.

A Quantitative Assessment of Prefrontal Cortex in Humans Relative to Nonhuman Primates

The paper quantifies prefrontal cortex (PFC) size in humans relative to nonhuman primates, finding humans have significantly larger PFC gray and white matter volumes compared to chimpanzees and macaques.

Lack of evidence for sex differences in higher cognitive function in macaques

This study finds no sex differences in higher cognitive function between male and female rhesus monkeys in episodic memory and strategy implementation tests.