8 Parietal Cortex Flashcards
What are the three main boundaries in the parietal cortex
- central sulcus
- parieto occipital fissure
- lateral sulcus
What are the boundaries of the post central gyrus
Central and post central sulcus
What is the posterior parietal lobe made up of?
Made up of superior parietal lobule (SPL) and inferior parietal lobule (IPL) and is split by the intraparietal sulcus (IPS)
5 subdivisions of parietal cortex
- primary somatosensory cortex
- intraparietal sulcus and superior parietal lobule
- right inferior parietal lobule
- left anterior inferior parietal lobule
- left posterior inferior parietal lobule
What is the function of the primary somatosensory cortex
Processes information about body sensations (feel)
Where does the input into the primary somatosensory cortex come from?
Thalamus and motor cortex
Where is the output of the primary somatosensory cortex?
Mainly the motor cortex and posterior parietal cortex
What can knowledge of the primary somatosensory cortex help with?
Making prosthetic limbs more realistic
Function of intraparietal sulcus and superior parietal lobule
Interacting with objects. Spacial awareness of body.
What is balint’s syndrome?
Caused by a lesion in intraparietal sulcus and superior parietal lobule.
It causes:
•optic ataxia: deficit in visually guided reaching movements
•oculomotor apraxia: inappropriate fixation of gaze and difficulties shifting gaze
•simultanagnosia: impaired ability to perceive multiple items
Function of right inferior parietal lobule
Sustaining attention on current tasks and detecting salient events
Spatial hemineglect
A lesion in the right inferior parietal lobule which means patients neglect the left side of objects
Functions of left anterior inferior parietal lobule
Understanding tool use actions. A lesion inspires gestures or real tool use
Function of left posterior inferior parietal lobule
Detects salient events in mind, default mind processing and mind wandering
