| Layer V (Internal pyramidal) | Layers of Cerebral cortex is prominent in motor areas and rich of Betz cells |
| II (External granular), III (External pyramidal) , IV(Internal granular) | Layers of Cerebral cortex is prominent in sensory cortex |
| Giant pyramidal (Betz) cells | corticospinal tracts originate in Primary motor cortex in |
| Commissural fibers | Fibers or nerve cell processes that connect identical areas of CC;
Information from one hemisphere passes to the hemisphere |
| Association fibers | Connect adjacent areas within same cerebral hemisphere |
| Projection fibers | All ascending and descending fibers that enter or leave cerebral cortex that Projection as Internal capsule& Corona radiata |
| genu (Forceps minor) | Parts of Corpus Callosum that connect identical areas of frontal lobes |
| splenium (Forceps major) | Parts of Corpus Callosum that connect occipital lobes |
| body (Transverse fibers) | Parts of Corpus Callosum connect parietal and temporal lobes |
| corpus callosum | - essential for learned discrimination, sensory experience and memory as it interconnects symmetrical areas |
| ‘split brain’ | Destruction of corpus callosum cause |
| alexia (-cannot understand written words but can speak and write) | Destruction of splenium cause |
| Corticopontine (Frontal) & Thalamocortical fibers | Anterior Limb of Internal Capsule connect with |
| Corticonuclear and Corticospinal fibres to head and neck | Genu part of Internal Capsule connect with |
| Corticospinal fibres to trunk, upper and lower limbs
Corticopontine & Thalamocortical (tempral , pariatal & occipital)
Corticorubral fibres | Posterior limb of Internal Capsule connect with |
| middle cerebral artery branche (Lenticulostriate known as Charcot’s artery) & Anterior cerebral artery | Blood supply of internal capsule |
| Retrolentiform part | - loss of vision caused by lesion in which part of internal capsule |
| Sublentiform part | loss of hear caused by lesion in which part of internal capsule |
| internal capsule | Contralateral hemiplegia and contralateral hemianesthesia
caused by lesion in |
