Related Experiment Video
Updated: Jul 17, 2026

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations
Published on: February 15, 2017
Clustering of ipsilateral cortico-cortical projection neurons to area 7 in the rhesus monkey
R W Hiorns1, J W Neal, R C Pearson
1Department of Statistics, Oxford, U.K.
Abstract:
The distribution within individual cytoarchitectonic areas of the cells of origin of ipsilateral cortico-cortical fibres to area 7 of the parietal lobe of the monkey has been studied. After injections of horseradish peroxidase into area 7, labelled cells in a variety of cortical areas were plotted and their distribution along the length of the cortex analysed. Significant clustering of labelled cells was seen wherever their numbers were sufficient for meaningful statistical analysis. In most cases, further analysis using correlation techniques revealed a significant banding of labelled cells across the cortex. Typical bands varied from 500-800 microns in width, and formed an irregular branching and rejoining pattern across the cortex. The intra-area distribution of cortico-cortical projection neurons is comparable to the distribution of neurofibrillary tangles in the cortex in Alzheimer's disease.
More Related Videos
Related Concept Videos
Motor and Sensory Areas of the Cortex
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Association Areas of the Cortex
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Somatosensory, Motor, and Association Cortex

