exam 3 Flashcards
(15 cards)
Primary Auditory Cortex
- receives input first from MGN
- tonotopic of place code
- respond best to complex, natural tones
- located in lateral fissure
Primary Auditory Cortex Streams
- Anterior stream = what pathway
- Posterior stream = where pathway
Secondary Auditory Cortex
Belt and Parabelt = core region
Exteroreceptive system
mediates external stimuli to skin
- thermal
- nocioceptive
- mechanical
Exteroreceptive system pathways
- peripheral pathway
- dermatomes - central pathway
- spinal cord to brain
Sensory homunculus
primary somatosensory cortex cortically magnifies certain areas
Dorsal column medial lemniscus system
mediate tocuh and proprioreception
Anterolateral system
mediate pain and temp
Associated cortex of the primry somatosensory cortex
Dorsal stream = multisensory integration and attention to external events
Ventral stream = object shape perception
Pain circuit
- paraquaductal grey contain opiod receptors for endorphins which cause a analgestic effect
- Raphe nuclei in CNS inhibit interneurons
- Pain signals inhibited from reaching brain
Sensorymotor cortex
- supplimentary motor area and premotor area
- input from PPAC and DLPAC
- motor programminf specific contractions with inhibition/activation
- bilateral
- neurons activated throughout movement
Primary Motor Cortex
- in precentral gyrus
- point of convergence for cortical sensorimotor signals projecting to muscles
- target coding
target coding
codes for moving limb from different start postion
Cerebellum motor learning
learning new sq of movement
Basil ganglia in Sensorimotor system
modulate motor signals with loops
- habit learning (conditioning/trials)
- cognitive functions
