Motor & Sensory Pathways Practice Questions Flashcards
Where is the decussation of the DCML system?
Caudal medulla
Where are the cell bodies of the 3rd order neurons located, the ones that terminate in the cerebral cortex?
Thalamus
What is Clarke’s column (Clarke’s nucleus)?
Origin of posterior spinocerebellar tract
Which of the following describes the spinal trigeminal system?
A) controls the muscles of mastication
B) conveys tactile info from the head and face
C) conveys info on pain and temp from the head and neck
D) a descending pathway from cranial nerve to spinal cord
E) sends APs directly to the thalamus
C) conveys info on pain and temp from the head and neck
All tracts in the anterior funiculus tend to affect
Axial motor neurons
Which of the following can also be called the spinotectal tract?
Spinomesencephalic tract
Which of the following is associated with attempted movement?
Anterior spinocerebellar tract
Afferents for pain and temp enter the dorsal horn at the
Substantia gelatinosa
Damage to the lateral spinothalamic tract (LSTT) will result in
Loss of pain and thermal sensation
T/F: in the posterior column pathway, additional fibers add laterally
True
The ribbon of axons formed by ascending posterior column fibers is known as the
Medial lemniscus
Ascending fibers within the gracile fasciclus synapses in the ____________ nucleus
gracile
______% of the fibers in the descending corticospinal tract cross in the pyramidal decussation
85
Which tract is responsible for reflex movements of the head and neck to visual stimuli?
Tectospinal tract
In the spinal cord, another word used in place of funicular is
Column
Spinocerebellar pathways are located in the ___________ columns
lateral
T/F: all ascending tracts reach the cerebral cortex
false
Endings in hair follicles would most likely transmit via which pathway?
ventral spinothalamic tract
Which pathway has 2nd order neurons in the nucleus proprius?
anterior spinothalamic tract
Sharp, fast localized pain is transmitted by what fibers?
A delta
Lissaur’s tract is associated with which ascending pathway?
lateral spinothalamic tract
2 point discrimination from the hand projects to a 2nd order neuron located where __________________ is
nucleus cuneatus
In the lateral spinothalamic tract, the 2nd order neurons have axons that project
A) ipsilateral
B) bilateral
C) contralateral
C) contralateral
Which of the following tracts projects many axons to the RF?
A) corticospinal tract
B) anterior spinocerebellar tract
C) anterior spinothalamic tract
D) DCML
E) lateral spinothalamic tract
E) lateral spinothalamic tract
What tract is this?
rubrospinal tract
Which tract is this?
anterior spinothalamic tract
What tract is this?
lateral spinothalamic tract
GSAs within the trigeminal n. join which ascending pathway?
dorsal column pathway
Conscious proprioception is transmitted by the ____________
DCML
Which proprioceptive pathway starts with 1st order neurons between L1 and S2?
anterior spinocerebellar tract
All descending tracts in the anterior funicular tend to affect
axial motor neurons
Unconscious proprioception from the upper limbs ascends as the ____________ tract
cuneocerebellar
