Test 2 Ascending and descending tracts Flashcards
What is the main sensory neuron?
DRG
Conscious sensation is perceived by ___
cerebral cortex
Unconscious sensation is perceived by ___
cerebellum
2 functions of dorsal column medial lemniscus pathway
Proprioception and discriminative touch
DCML 1st order neurons enter spinal cord and travel up __ or __ fasciculus.
Cuneate
Gracile
Gracile Fasciculus transmits info about the ___ body and is in what part of spinal cord?
Lower
entire spinal cord
Cuneate Fasciculus transmits info about the __ body and is in which part of the spinal cord?
Upper
Upper half
2nd order DCML neurons synapse at either the __ or __ nucleus in the ___
cuneate
gracile
Medulla
Lateral Spinothalamic tract function
Pain and temperature
Anterior Spinothalamic tract function
Crude Touch
Where do Spinothlamic tract 2nd order neurons synapse?
Lamina 1, 4, 5
Where does lateral spinothalamic tract cross?
Over 1 segment
Where does anterior spinothalamic tract cross?
over several segments
Spinoreticular tract function
Awareness
Emotion of sensation–> pain
Where do 2nd order spinoreticular neurons synapse?
Dorsal horn 5-7
Where to spinoreticular fibers cross?
THEY DON’T.
What is Post. Spinocerebellar tract function?
Fine motor control
posture
lower limb
Where does second order post. spinocerebellar tract synapse?
Dorsal Nucleus of Clarke (7)
What is cuneocerebellar tract function?
fine control
movement
posture
upper limb
Where does 2nd order cuneocerebellar tract synapse?
Accessory cuneate nucleus
Anterior Spinocerebellar tract function
Group 1 afferents
lower limb
Coordinate movement and posture
Where does anterior spinocerebellar tract cross?
Anterior White Commissue and again in cerebellum
