-
3 vestibular receptors
- semicircular canal
- utricle
- saccule
- maculae too?
-
semicircular canal
phasic receptors responding to movements of head and face
-
utricle and saccule, maculae?
- static receptors responding to force of gravity acting on the head and linear acceleration and deceleration
- information sent to cerebellum for orientation of position in space
-
number of pathways going to cortex
3
-
number of pathways going to cerebellum
3
-
Spinothalamic system (small/large fiber, myelinated/ non- myelinated, low/ high frequency, conscious/unconscious)
- Small fiber
- Non myelinated
- Low frequency
- conscious
-
Lateral spinothalamic modality
Specific, less specific pain and temperature
-
Lateral spinothalamic receptor
Free nerve endings
-
Lateral spinothalamic pathway
- Primary neuron: receptor --> DRG --> DH and synapses in laminae I-IV, substancia gelatinosa
- Secondary: crosses to contralateral side in the ventral white commissure --> central portion lateral funiculus --> forms bundle and ascends as lateral spinothalamic tract through lateral luminesces and synapses in thalamus (VPL)
- Tertiary: ascends through internal capsule to post central gyrus of cerebral cortex (Areas 1,2,3 then 5 and 7)
-
Lateral spinothalamic tract damage left L3
- Left LE
- Less specific pain and temp
-
Lateral spinothalamic damage T7
- Left lower trunk, LE
- Less specific pain and temp
-
Lateral spinothalamic damage T1
- Left trunk, LE
- Less specific pain and temp
-
Lateral spinothalamic damage C1
- Left entire body
- Specific/ less specific pain and temp
-
Lateral spinothalamic damage VPL
- Left entire body
- Specific/ less specific pain and temp
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