Proprioception Pathwys - 4/19 Stephens Flashcards
Primary axons of the VST do what?
Secondary axons cross where? Form what?
Ascend 6-10 cord segments in the Posterior Funiculus while sending numerous collateral terminals to secondary neurons in the ipsilateral NP and intermediate gray
AWC and form the VSTT
In the ventral Spinothalamic pathway the VSTT joins what to form what?
This terminates where?
Finally ends up where?
joins LSTT to form SL
On tertiary neurons in the VPL nucleus of the dorsal thalamus
Primary somesthetic cortex via posterior limb of internal capsule and corona Radiata
Unilateral lesions of the VSTT result in what?
Difficult to lose crude touch sensations
Result of unilateral lesion of the SL?
Contralateral hemianalgesia and thermal hemianesthesia
May still have passive touch
What tract conveys precise proprioception of individual muscles and lower extremity information (Unconscious)?
Dorsal Spinocerebellar Tract
What tract conveys precise information from the upper extremity (Unconscious)?
Cuneocerebellar Tract
What tract conveys information from gross proprioception of whole limb and lower extremity (Unconscious)?
Ventral Spinocerebellar Tract
What tract conveys gross postural and limb proprioception from the upper limbs (Unconscious)?
Rostral Spinocerebellar Tract
In the DSCT primary central processes from what spinal nerves terminate on cells in what nucleus of the thoracic spinal cord?
C8-L3
nucleus dorsalis
Spinal nerves at what level must ascend via the FG before terminating in the nucleus dorsalis?
The nucleus dorsalis conveys information from these levels to where?
Via what?
L4-S5
Cerebellar vermis via the ipsilateral DCST
The Ventral Spinothalamic Pathway (VST) system conveys what?
Where are the cell bodies located (primary neurons)?
Light (passive) touch, crude tactile sensation and pressure
Dorsal root (spinal) ganglia
