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Brain cortex

Build up and function of somatosensory cortex , motor cortex an distinction to tertiary cortex

Mario Roeber

on 22 March 2011

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Transcript of Brain cortex

primary somatosensory cortex 1) it receives dense inputs from of the thalamus

2) its neurons are highly responsive to somatosensory stimuli

3) lesions here impair somatic sensation

4) electrical stimulation evokes somatic sensory experience BA 3a proprioception.

The projection from 3b to 1 primarily relays texture information

The projection to area 2 emphasizes size and shape. Secondary somatosensory cortex primary motor cortex controlling execution of movement

secondary motor cortices

premotor cortex
motor guidance of movement and control of proximal and trunk muscles of the body

supplementary motor area ( SMA)
planning and coordination of complex movements such as those requiring two hands. Frontal lobe Parietal lobe Occipital lobe Temporal lobe The frontal lobe contains most of the dopamine-sensitive neurons in the cerebral cortex.reward,attention,
longterm memory, planning, and drive. Function
recognize future consequences resulting from current actions,
choose between good and bad actions (or better and best),
override and suppress unacceptable social responses,
determine similarities and differences between things or events.
longer term memories which are not task-based. auditory perception
semantics in both speech and vision
formation of long-term memory. primary visual cortex
lateral intraparietal (LIP)
system for targeting eye movements

ventral intraparietal (VIP)
area receives input from a number of senses

medial intraparietal (MIP)
location of a reach target in eye-centered coordinates.

anterior intraparietal (AIP)
responsive to shape, size, and orientation of objects to be grasped two hemispheres- left and right

left hemisphere
involved in symbolic functions in language and mathematics.

right hemisphere
specialised to carry out images and understanding of maps Damage
right hemisphere
loss of imagery, visualization of spacial
relationships and neglect of left side space
and left side of the body.

left hemisphere
problems in mathematics, long reading,
writing and understanding symbols. Primary motor cortex Supplementary
motor area Premotor
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