L7 Cortex Flashcards
SENSORY signals from all modalities of sensation terminate in the areas immediately
( somatosensory cortex location )
POSTERIOR to the central fissure ( postcentral gyrus )
Sensory cortex in which lobe
Partial
Area 312
somatosensory area
Body representation in somatosensory area I ?
-high degree of localization
-upside down
-head erect position
-inverted
-leg medial
-face lateral
Body representation in somatosensory area II ?
- low degree of localization
- face anterior , arm central
- leg posterior بس محدده ذول
Which has wide area of representation in somaosensory area
Face
…………….is represented in the most lateral portion of somatosensory area I, and the lower part of the body is represented ……………
Head
medially
Funct ions of Somatosensory AREA I
1-localize discretely different sensations
2-judge critical degrees of pressure
3- judge the weights of objects.
4-judge shapes or forms
5-judge texture of materials.
لو خسر المنطقه ، راح يخسر الاحكام هذه
astereognosis.
unable to judge shapes or forms of objects.
In the specific absence of only somatosensory area I, appreciation of
Pain and temp
still preserved both in quality and intensity. But sensations are poorly localized.
SOMATOSENSORY ASSOCIATION AREAS
5 & 7, in the parietal cortex behind somatosensory area I
deciphering deeper MEANINGS of the sensory
information in the somatosensory areas.
SOMATOSENSORY ASSOCIATION AREAS
SOMATOSENSORY ASSOCIATION AREAS
Connections :
receives signals from:
(1) somatosensory area I
(2) ventrobasal nuclei of thalamus
(3) other areas of thalamus
(4) visual cortex
(5) auditory cortex.
Effect of Removing the Somatosensory Association Area
AMORPHOSYNTHESIS
cerebral cortex contains ….. layers of neurons,
six
