Characterization of the Porcine Cingulate Sulcus Cytoarchitecture

Area of Science:

• Neuroscience
• Comparative Anatomy
• Brain Evolution

Background:

• Cortical folding (gyrification) increases brain surface area within the skull.
• Gyrification leads to heterogeneous neuronal organization, unlike smooth rodent brains.
• Mechanisms of gyrification, including genetic and cellular factors, are still debated.

Purpose of the Study:

• To investigate cellular differences in the porcine cingulate sulcus.
• To compare neuronal density and cell types between the cingulate fundus and walls.
• To examine the distance between pyramidal neurons in Layers III and V and identify gigantopyramidal neurons.

Main Methods:

• Comparative analysis of neuronal density and cell types in the porcine cingulate sulcus.
• Measurement of inter-neuronal distances in Layers III and V.
• Identification of specific neuronal subtypes, including gigantopyramidal neurons.

Main Results:

• Significant differences in neuronal density and supporting cells were found between the cingulate fundus and walls.
• Increased neuronal density in the cingulate fundus correlated with decreased inter-neuronal distance.
• Gigantopyramidal neurons were identified in the porcine cingulate sulcus fundus.

Conclusions:

• The porcine cingulate sulcus displays heterogeneous cellular composition.
• Findings support the heterogeneous nature of gyrified brains.
• The presence of gigantopyramidal neurons in pigs offers insights into brain evolution and comparative neuroanatomy.