Neuro Tracts Flashcards
What is another name for the anterolateral system ?
Spinothalamic tract
What is another name for the medial lemniscial tract?
Dorsal column
What does the medial lemniscial tract transmit?
Fine touch, proprioception, vibration, and pressure
What is the corticospinal tract?
Transmits motor impulses
What is the Lissauer tract?
Intermediary pathway that relays sensory input in the spinal cord
What is gray matter? how many subdivisions? How are they broken down?
10
1-6 are sensory
7-9 are motor
10 is a crossover area
Where do sensory neurons enter through?
Dorsal root
Where do motor neurons exit through?
Ventral root
What is the dorsal system? Another name?
Medial lemniscal system
Transmits mechanoreceptive sensations
Touch, vibration, proprioception, and pressure
Two point discrimination
Large, myelinated
More advanced
Where does the dorsal system crossover?
Second order neuron in the medulla
What do Meissner’s corpuscles do?
Two point discrimination and vibration
What do Pacinian corpuscles do?
Vibration
What do Merkel’s discs do?
Continuous touch
What do Ruffini’s endings do?
Proprioception and prolonged touch and pressure
What is the anterolateral system ? Another name?
Spinothalamic tract
Sensory
Pain, crude touch, tickle, itch, sex
Small, slow conducting fibers
No two point
What is the corticospinal tract do?
Motor pathway
What do SSEPs monitor?
Dorsal column (Posterior arteries)
What do MEPs monitor?
Corticospinal tract (Anterior artery)
Which pathway is the tract of Lissauer apart of?
Spinothalamic tract
Which mechanoreceptor allows blind people to read brail?
Meissner’s corpuscles (two point)
What tract are mechanoreceptors apart of?
What tract transmits pain?
Spinothalamic
Primary treatment for neurogenic shock?
Intravascular expansion with norepinephrine
Norepi
remove stimulus?
What is preserved if the anterior spinal artery is clamped?
Touch and proprioception
What tract is perfused by anterior blood supply?
Corticospinal tract
and
Autonomic
and
Spinothalamic
What tract is perfused by posterior supply?
Dorsal column
What tract does Babinski test for?
Corticospinal
