WHITE MATTER OF CEREBRUM
- White matter of cerebrum ( श्वेत पदार्थ मस्तिष्क )
- types of fibers in the white matter ( प्रकार )
- association fibers ( intra hemispheric fibres - अंतः गोलार्ध तन्तु )
- features
- interconnect different regions of same cerebral hemisphere
- एक ही पक्ष गोलार्ध के विभिन्न भागों को जोड़ना
- types
- short association fibers ( arcuate or U fibers ) - छोटे संयोजक
- long association fibers ( दीर्घ संयोजक )
- connect gyri of different lobes ( दूसरे खंड को जोड़ना )
- types
- uncinate fasciculus (
- connects motor speech area ( प्रेरक वाक क्षेत्र ) and orbital cortex (नेत्रकोटर ) of frontal lobe
- to cortex of temporal lobe ( शंख क्षेत्र )
- cingulum or limbic association bundle ( पट्टीका )
- thick fibers occupying cingulate and parahippocampal gyri
- extends from parater-minal gyrus to uncus
- forming almost a circle like a girdle
- superior longitudinal bundle ( अधि , ऊपरी लंब पुंज )
- longest association bundle
- connects frontal lobe to ( ललाट को )
- occipital and temporal lobes ( पीछे , पश्च और शंख खंड से जोड़ना )
- inferior longitudinal bundle ( निम्न , अधः लंब पुंज )
- connects visual association area to ( दृष्टि क्षेत्र )
- temporal lobe ( शंख खंड से जोड़ना )
- fronto-occipital bundle
- commences in frontal pole
- runs backwards to radiate in occipital and temporal lobes
- commissural fibers ( interhemispheric fibres )
- Anterior commissure
- Posterior commissure
- Hippocampal commissure
- Habenular Commissure
- projection fibers ( प्रक्षेप )
- connect cerebral cortex to subcortical centres
- types
- corticofugal fibers ( अवप्रान्तस्था )
- go away from cortex ( cortical efferents )
- corticopetal fibers ( अभिप्रान्तस्था )
- come to cerebral cortex from other centres
- types
- present in neocortex
- present in allocortex
- fimbria
Discussion