Neuropil Variation in the Prefrontal, Motor, and Visual Cortex of Six Felids

Area of Science:

• Neuroscience
• Comparative Anatomy
• Zoology

Background:

• Felids exhibit specialized morphology for obligate carnivory.
• Musculoskeletal anatomy of Felidae is well-studied, but comparative neuroanatomy remains underexplored.
• Little is known about how cerebral anatomy variation relates to felid sociality, hunting, or activity patterns.

Purpose of the Study:

• To quantitatively analyze neuropil variation in felid cortical regions.
• To investigate relationships between neuropil, brain size, neuronal parameters, and behavior/ecology.
• To explore cross-species differences in felid neuroanatomy.

Main Methods:

• Quantitative analysis of neuropil in prefrontal, primary motor, and primary visual cortices.
• Study included six Felidae species: lion, snow leopard, tiger, leopard, cheetah, and domestic cat.
• Neuropil was analyzed in relation to brain size, neuronal cell parameters, and behavioral/ecological factors.

Main Results:

• Significant species and regional differences in neuropil proportions were observed.
• African lions, cheetahs, and tigers showed higher neuropil fractions across all studied cortical regions.
• Increased prefrontal neuropil correlated with behavioral flexibility; motor cortex neuropil with hunting; visual cortex neuropil with diel activity.

Conclusions:

• Provides a cross-species comparison of neuropil fraction variation in Felidae, including the Panthera genus.
• Suggests that increased neuropil supports behavioral flexibility, hunting, and visual processing in felids.
• Presents evidence for neuroanatomical convergence between Panthera species and cheetahs.