SCID 251 - Quiz L2 -spinal Cord And Spinal Reflexes
- 1.A patient had weakness on the right leg, with spasticity, hyperreflexia, and a Babinski’s sign. There was also decreased pain sensation in the left leg. Where is the most likely location of the lesion?
- A.
Left internal capsule
- B.
Right side of the medulla
- C.
Right side of the cervical spinal cord
- D.
Right side of the thoracic spinal cord
- E.
Parasagittal area of the left precentral gyrus
- 2.A patient had weakness of extension of the left elbow and hand intrinsic muscles. The left triceps jerk was absent. In the left leg, there was spasticity, hyperreflexia and Babinski’s sign. Where is the most likely location of the lesion?
- A.
Left side of the spinal cord at the C7 level
- B.
Left side of the spinal cord at the C6 level
- C.
Left side of the spinal cord at the C5 level
- D.
Right internal capsule
- E.
Right precentral gyrus
- 3.When you are examining a patient, you find several beats of ankle clonus. Given this finding, which one of the following are you likely to also find?
- A.
Flexor plantar response
- B.
Hyperreflexia
- C.
Muscle atrophy
- D.
Hypotonia
- E.
Fasciculations
- 4.A patient was unable to walk. On examination, there was flaccid paralysis of hip flexors, hip adductors, and knee extensors. Deep tendon reflexes were absent at the knees, and hyperactive at the ankles. He had Babinski’s sign bilaterally, and loss of pain and temperature sensation over both legs. Where is the most likely location of the lesion?
- A.
Bilateral lumbosacral plexus
- B.
Conus medullaris
- C.
L5 to S1 levels of the spinal cord
- D.
L1 to L3 levels of the spinal cord
- E.
Thoracic level of the spinal cord
- 5.Examination of a patient with traumatic cervical cord injury revealed spasticity of legs with hyperreflexia at knee and ankle jerks. What is the best explanation of these findings?
- A.
The sensory pathways from the skin to the cerebrum have been disrupted.
- B.
A direct projection from the cerebellum to the spinal cord has been disrupted.
- C.
The spinocerebellar tracts have been disrupted.
- D.
The axons of α-motor neurons that supply extrafusal muscle fibers have been transected.
- E.
Descending motor pathways that inhibit the muscle stretch reflexes have been disrupted.
- 6.Which is the neurotransmitter of the alpha motor motor?
- A.
Acetylcholine
- B.
Norepinephrine
- C.
Glutamate
- D.
Dopamine
- E.
GABA
- 7.Which is the neurotransmitter of the upper motor neurons?
- A.
Acetylcholine
- B.
Glutamate
- C.
Dopamine
- D.
GABA
- E.
Glycine
- 8.Where is the location of alpha motor neurons?
- A.
Rexed lamina II
- B.
Rexed lamina V
- C.
Rexed lamina VII
- D.
Rexed lamina IX
- E.
Rexed lamina X
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