Spinal Tracts And Reflexes
This quiz will test your knowledge of the many nerve tracts and reflexes learned in Neuroscience Summer Course 2010. You will need to know their function, their pathways, and the symptoms displayed when pathologies interupt these tracts or reflexes.
- 1.The function of the Medial Longitudinal Fasciculus is
- A.
Trunk Postural Adjustments
- B.
Neck Postural Adjustments
- C.
Controls eye movements
- D.
Discrimintive Touch
- E.
Fast Pain
- 2.Which statement is NOT true about the Symmetrical Tonic Neck Reflex (STNR)?
- A.
The STNR presents in typcial development until about 8-11 months of post-natal life
- B.
The STNR is a type of spinal cord reflex
- C.
The STNR is a precusor to crawling
- D.
In the STNR if the head is flexed, the arms flex and legs extend.
- E.
In the STNR if the head is extended, the arms extend & legs flex
- 3.Spinal Reflexes are the result of involuntary communication between Lower Motor Neurons and Upper Motor Neurons.
- A.
True
- B.
False
- 4.Which statement is true about the Myotatic Stretch Reflex?
- A.
This polysynaptic reflex starts with the lengthening of a muscle.
- B.
The lengthening of the muscle causes the Ia and II sensory axons to fire.
- C.
This ultimately results in the inhibition of the antagonist.
- D.
The Ia excites motor neurons (Gamma) to the same muscle, causing a contraction that opposes lengthening
- 5.Which tract(s) descends through the Lateral Funiculus?
- A.
Spinalthalamic
- B.
Anterior (ventral) Corticospinal
- C.
Rubriospinal
- D.
Lateral Corticospinal
- E.
C & D
- 6.Which tract(s) decussates at the Medulla?
- A.
The Dorsal Column Medial Lemniscus
- B.
The Spinothalamic
- C.
The Rubrospinal
- D.
The Lateral Corticospinal
- E.
A & D
- 7.You encounter a patient with Brown-Sequard Syndrome. His hemisection lesion is at the C6 level (right side). Which of the deficits listed below would you expect to see with this individual? You can select more than one.
- A.
Paralysis in his left lower extremeties
- B.
Paralysis in his right lower extremeties
- C.
Loss of pain and temperature sensation on his left side below the lesion
- D.
Loss of discriminative touch on his left side below the lesion
- E.
Loss of discriminative touch on his right side below the lesion
- 8.Which statement is TRUE about the dorsolateral system tracts?
- A.
They travel through the anterior funiculus.
- B.
Their function includes limb flexion and fine movements
- C.
Includes the Lateral and Anterior Corticospinal Tracts
- D.
Terminates at the Anterior Funiculus
- E.
Affects mostly Extensor muslces
- 9.The cell bodies of all descending spinal tracts are in the Motor Cortex.
- A.
True
- B.
False
- 10.Children with Cerebral Palsy display strong ATNR and STNR may be due to...
- A.
Damage to Lower Motor Neurons that occured in gestation
- B.
A hemisection spinal cord lesion caused by a genetic mutation
- C.
Bilateral symmetric malformation or swelling in the motor cortex
- D.
Loss of Dopamine in the Basal Ganglia
- 11.The Lateral Corticospinal Tract mostly synapses with interneurons in the spinal cord.
- A.
True
- B.
False
- 12.Because the Ventral/Anterior corticospinal tract descends ipsilaterally, it only affects the ipsilateral side.
- A.
True
- B.
False
- 13.Not all descending tracts decussate before synapsing at the level of the spinal cord.
- A.
True
- B.
False
- 14.Select all the tracts that are in the Ventralmedial System, which travel through the anterior funiculus. You can select more than one answer.
- A.
Lateral Corticospinal
- B.
Medial Recticulospinal
- C.
Corticobulbar
- D.
Lateral Recticulospinal
- E.
Vestibulospinal
- 15.The Lateral Corticospinal Tract exits the spinal cord at the...
- A.
Ventral Root
- B.
Dorsal Root
- C.
Dorsal Root Ganglion
- D.
It does not exit the spinal cord
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