Cortex Flashcards
1
Q
Area 3a
A
- proprioception (muscle spindles)
- to area 2
2
Q
Area 3b
A
- fast and slow adapting cutaneous receptors
- to area 1 = texture
- to area 2 = size and shape
3
Q
Area 1
A
- texture (from 3b)
- projects to 2
4
Q
Area 2
A
- size and shape (3b)
- to secondary somatosensory cortex and primary motor cortex
5
Q
WHAT
A
- important for recognizing objects by touch without vision (texture/shape)
- occurs at SII, parietal operculum, insula
- discrimination of fast/acute pain
6
Q
WHERE
A
- posterior parietal cortex (areas 5 and 7)
- awareness of object location
- important role in perception of body image
- integration of SS, visual, and auditory info for perception/attention
7
Q
Lesion - S1
A
- deficits in position- can’t discrim size, texture, shape CONTRA
- 3b- lose discrim of texture, size, shape
- 1- texture
- 2- size and shape
8
Q
Lesion - S2
A
- tactile agnosia- can feel/see/hear but not identify
- shape and texture impairments
- prevents learning new tactile discim based on shape
9
Q
Posterior Parietal Cortex
A
- associative area
- essential for perception/interpretation of spatial relationships, accurate body image, and learning of tasks involving coordination of the body in space
10
Q
Area 5
A
integration of tactile info from mechanoreceptors in skin with proprioceptive info from ms/jt
11
Q
Area 7
A
- visual, tactile, and proprio integration
- basis for aligning our body-centered spatial coordinate system with the environmentally defined spatial coordinate system based on SS and visual inputs
12
Q
Posterior Parietal Cortex - lesion
A
- tactile agnosia
- neglect syndrome
13
Q
Insula
A
- discriminating quality/intensity of stimulus
- affective aspects of pain (intensity)
- part of a network of cortical regions mediating body homeostasis
- visceral motor center (HR w ex)
14
Q
Anterior Cingulate Cortex (ACC)
A
-emotions
15
Q
Primary sensory cortex
A
-localization, intensity of stim
