Exam 2 - Practice Questions Flashcards
(47 cards)
Things that you see, hear, and touch are examples of what kind of stimuli?
Exteroceptive
The erector spinae is innervated by neurons found in the ___?
Medial ventral horn
How much was the per month rent for my kansas city apartment
100
Where are alpha motor neurons found?
Gray matter of spinal cord
Proprioceptive sensation of the lower limb is carried by which tract?
Gracile
Sensory information arriving at one side of the body or head typically reaches the cerebral cortex of the contralateral side. The axons that cross the midline to accomplish this are the axons of?
2nd order neurons
What tract turns your head in response to stimuli?
Tectospinal
The nucleus dorsalis is located in the spinal cord at the segment levels ___?
T1-L2
Most reflexes are simple and require synapses within only one spinal segment. Which reflex requires synapses over several spinal segments?
Withdrawal reflex
Which does not contain corticobular fibers?
Lateral corticospinal
Which contains descending upper motor fibers?
All of the above
Which pathway carries pain sensation to the cerebrum?
Spinothalamic
A 58-year-old women complains of left hand weakness that she noticed while planting flowers in her garden. Neurological examination indicates weak wrist and finger flexion and extension. She also has weakness when abducting, adducting, and opposing her thumb. All other motor and sensory tests are normal?
Right precentral gyrus
A 52-year-old woman unable to move her left leg visits your office. Sensory modalities in all of her limbs are retained and there appears to be no sign of weakness in any of her other limbs. In which of the following structures are the cell bodies of lower motor neurons innervating the lower limb located?
Lamina VIII and IX
Where do the fibers of the anterior corticospinal tract cross?
Midline of the spinal cord
A 63-year-old man has a loss of discriminative touch, vibratory sense and proprioception on his right arm. Where are the cell bodies for the second order neurons in the pathway located?
Cuneate nucleus
The lamina of Rexed (spinal lamina of the gray matter) that collectively form the posterior horn of the spinal cord are?
Lamina I - VI
A simultaneous and opposite pattern of activity in the contralateral limb is known as?
Crossed effects
A 35-year-old roofer is examined in the emergency department after falling two stories and landing abdomen first on a barrel. Examination reveals weakness and loss of pain and temperature sensation in the left and right lower limbs. What area of the CNS is most likely involved?
Anterior spinal cord
The area of skin that is innervated by a single nerve and its receptors is called a ___?
Receptive field
What are the posterior columns?
Gracile and cuneate fascicles
What are the crossing fibers originating from the gracile nucleus called?
Internal arcuate fibers
The posterior spinocerebellar tract originates from which nucleus?
Dorsal thoracic
Neurons in the spinal ganglia are ___?
Pseudounipolar
