Pathways Condensed Flashcards
What does dorsal column carry information about?
Sensory information
Fine touch
proprioception
Vibration
What are the 2 parts of the dorsal columns
Fasciculis gracilis
Fasciculis cuneatus
Where does the fasciculis gracilis give info from
low limbs
Where does the fasciculis cuneatus give info from?
Upper lumbs
What does the lateral spinothalamic tract detect?
Pain
Temp
What does the anterior spinthalamic tract detect
Crude touch
Where does the dorsal column decussa?
Medulla oblongata
Where does the lateral and anterior spinothalamic tract decussate?
At level of spinal cord
Spinal cord entry
What are the 2 corticospinal tracts?
Lateral and anterior
Where do CST decussate?
At medulla oblongata
Why are CST pyramidal tracts?
Cause they pas through pyramids in medulla
Which side to CST carry info to?
Contralateral
Where do CST arise from?
motor cortex
What do CST control generally?
Voluntary muscle movements
What does lateral CST control?
Voluntary distal limb movement
What does anterior CST control?
Voluntary axial limb movement
Where does rubrospinal tract originate?
Red nucleus of midbrain
What does RBS control?
Voluntary control of muscles
What happens if CST is lesioned?
RBS can resume all normal functions of CST
Where does RST decussate?
Ventral tegmental decussation
What are the ventromedial pathways?
Tectospinal
Vestibulospinal
Reticulospinal
Where does tectospinal tract originate?
Superior colliculus
Does tectospinal tract decussate?
Yes
Function of tectospinal tract?
Mediate reflex movements in repsonse to visual stimuli
Where does tectospinal mainly terminate?
Cervical spinal cord
Where does vestibulospinal tract originate?
Vestibular nuclei
of pons and medulla
Does vestibulospinal tract decussate?
No
What does vestibulospinal tract control?
Control of extensor motor neurons to maintain posture
Based on head and bony labrynth movement
2 types of reticulospinal tracts
Pontine
Medullary
Where does medullary reticulospinal tract originate?
Reticular formation
Medulla
Where does pontine reticulospinal tract originate?
Reticular formation
Pons
What do reticulospinal tracts involve?
Reflexes
Muscle tone
Also involved in breathing and circulatory system
