CNS Exam 2 Flashcards
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
Which pathway carries pain sensation to the cerebrum?
Spinothalamic
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
Dermatome of upper arm:
C7
Type of nocioceptor:
Free nerve ending
Follicular receptor =
Mechanoreceptor
Stimulus of a stretch receptor:
Muscle spindle
Which of the following is not encapsulated?
Merkel’s
Which of the following is for vibration?
Pacinian
Pain sensation to the cerebellum:
Spinothalamic
Left arm, left leg weakness:
Right cerebellum
What does not contain coricobulber fibers?
Lateral Corticospinal
Patellar reflex is an example of:
Myotatic
Fibers cross:
Withdrawal reflex
Aging motor units:
Decrease with time
How many neurons in a reflex?
2
Upper arm:
Cuneate tract
Muscle contraction:
Gamma
Excessive contraction prevented by the:
Golgi tendon organ
Which receptors are within the body?
Interoreceptors
Stimuli from the internal environment?
Interoceptor
The older you get the ______ motor units you will have.
Less/fewer
Reticular formation is located in the ___________.
Tegmentum of pons, medulla, and midbrain
Alpha motor neurons are located where?
Gray matter of spinal cord.
Proprioceptive sensation of the lower limb is carried by what?
Gracile
Sensory information arriving at one side of the body or head typically reaches the vertebral cortex of the contralateral side. The axons that cross the midline to access this are axons of what?
2nd Order Neurons
What is the tract that turns your head in response to a stimulus?
Tectospinal tract
Which reflex requires synapses over several spinal segments?
Withdrawl
What does not contain corticobulbar fibers?
Lateral corticospinal
Which pathway carries pain to the cerebrum?
Spinothalamic tract
The area of skin innervated by a single nerve and its receptors is called a?
Dermatome
What are the crossing fibers of the gracile nucleus called?
Internal arucate fibers
The posterior spinocerebellar tract originates from which nucleus?
Dorsal Thoracic
Nocioreceptors are ________
Free nerve ending
Patellar reflex is:
myotactic
Vestibulospinal tract nucleus is located in?
Lateral vestibular nucleus
Gracile nucleus/ fasciculus is located in?
Dorsal Root Ganglion (DRG)
Level of awareness?
Recticular activating system.
