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23 terms

Tracts in white columns of Spinal Cord

I finn a get an A in neuro!
STUDY
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what are the 8 tracts found in the white matter of the spinal cord?
1. Lateral corticopsinal
2. anterior corticospinal
3. rubrospinal
4. lateral vestibulospinal tract
5. lateral spinothalamic
6. fasciculus cuneatus
7. fasciculus gracilis
what is a TRACT?
a group of nerve fibers in the CNS
what is a nucleus?
a functional grouping of neuron cell bodies in the CNS
which are UPPER MOTOR NEURON tracts in the Spinal cord and are they descending or ascending?
1. Lateral corticospinal tract
2. Anterior corticospinal tract
3. Rubrospinal tract
4. Lateral vestibulospinal

Girl, they all be descending tracts!
what are the SENSORY TRACTS in the spinal cord and are they ascending or descending?
1. lateral spinothalamic
2. anterior spinothalamic
3. fasciculus gracilis
4. fasciculus cuneatus

-ASCENDING, girl!
tracts of the spinal cord can be divided into?
Upper motor neurons an Sensory neurons
what are the features of the lateral corticospinal tract?
Its a descending motor neuron fibers descend from the cerebral cortex from an upper motor neuron
what is the function of the lateral corticospinal tract
Synapses on and controls the activity of LATERAL MOTOR NEURONS

-lateral corticospinal = lateral motor neurons
what are some features of the anterior corticospinal tract?
Descending motor neuron fibers from cerebral cortex ie upper motor neuron
what is the function of the anterior corticospinal tract?
synapses and controls MEDIAL motor nuclei

-Cortical ANTS like to MEDitate
what are some features of the RUBROSPINAL TRACT?
Descending motor neuron fibers from red nucleus of midbrain (UMN)
what is the function of the RUBROSPINAL TRACT?
controls LATERAL MOTOR NUCLEI in upper limbs
what are some features of the lateral vestibulospinal tract?
Descending motor neuron fibers from the LATERAL VESTIBULAR NUCLEUS OF BRAINSTEM (UMN)
whats the function of the lateral vestibulospinal tract?
mediates medial motor columns and balance
what are some features of the LATERAL spinothalamic tract?
ASCENDING sensory neuron fibers from spinal cord
what is the function of the lateral spinothalamic tract?
transmits Pain and Temperature information to the thalamus.
what are some features of the anterior spinothalamic tract?
ascending sensory neuron fibers from spinal cord
what is the function of the anterior spinothalamic tract?
transmits LIGHT TOUCH information to the thalamus
what are some features of the fasciculus cuneatus?
ascending sensory neuron fibers from spinal cord or T6 and above
what is the function of the fasciculus cuneatus?
transmits 2 point tactile descrimination, conscious proprioception, vibrations, stereognosis to medulla
what are some features of the fasciculus gracilis
ascending sensory neuron fibers from posterior root ganglia of T7 and below
what is the function of facilculis gracilis
Similar to fasciculus cuneatus
ANTEROLATERAL SYSTEM
1. spinothalamic
2. spinoreticular
3. spinomessencephalic

involved in Pain and T
-all ascending