Dorsal Columns/Medial Meniscus System Flashcards
These laminae receive nociceptive primary afferent input from dorsal roots
Laminae I/II
Lesion of dorsal columns in the spinal cord results in:
Loss of ipsilateral 2-point discrimination, vibration, joint position
The posterior parietal cortex (Areas 5 & 7) help you to identify what?
Where the body is and where the stimulus is
From what levels of the spinal cord does the fasciculus gracilis carry information?
From T7 and below
Function of Brodmann’s area 1
Derives information about motion processing and direction of movement
The insular cortex/temporal lobe system helps you to identify what?
What you are touching
These laminae receive tactile/vibration afferent input from dorsal roots
Laminae III/IV
Lesions of SI cortex cause what?
Contralateral deficits in fine touch, 2 point discrimination, vibration, joint position
From what does Brodmann’s area 3a receive input?
Receives input from muscle spindle afferents that sense muscle stretch
To where do Brodman’s areas 5 & 7 project?
Motor areas of frontal cortex
What do Brodman’s areas 5 & 7 do?
Integrates tactile info from mechanoreceptors in skin with info from underlying joints and muscles and with visual information (hand/eye coordination)
Function of Brodmann’s area 3a
Derives information about kinesthesis (limb movement)
From what does Brodmann’s area 1 receive input?
Receives input from cutaneous rapidly adapting receptors
Function of Brodmann’s area 3b
Derives information about details of edges of objects and surface texture
From what does Brodmann’s area 3b receive input?
Receives input from cutaneous slowly and rapidly adapting receptors
