MOTOR AND SENSORY PATHWAY

Question 1

Pathway for conscious prorpioception

(1) _________ (hair follicles and touch pressure receptors) which convey the sensations of touch, vibration, hair movement, and pressure and
(2) __________ (muscle spindle, Golgi tendon organ, and joint receptors).

Answer 1

cutaneous mechanoreceptors

proprioceptive receptors

Question 2

Pathways for Nonconscious Proprioception

Answer 2

the posterior (dorsal) and the anterior (ventral).

Question 3

Axons of neurons in the ________(second-order neurons) form the posterior spinocerebellar tract, which ascends in the __________and the medulla oblongata to reach the cerebellum via the _______.

Answer 3

nucleus dorsalis

lateral funiculus of the spinal cord

inferior cerebellar peduncle (restiform body)

Question 4

Axons of neurons in the accessory cuneate nucleus form the________ which reaches the cerebellum via the restiform body.

Answer 4

cuneocerebellar tract,

Question 5

The ________ conveys to the cerebellum information related to interneuronal activity and the effectiveness of descending pathways.

Answer 5

anterior spinocerebellar tract

Question 6

Small-diameter, unmyelinated, or thinly myelinated fibers (C fibers and A delta fibers) that convey_________

Answer 6

pain and thermal sensations

Question 7

The_______ convey exteroceptive and proprioceptive sensations from the face to the thalamus.

Answer 7

trigeminal pathways

Question 8

Axons of neurons in the _________cross the midline and form the ventral secondary ascending trigeminal (ventral trigeminothalamic) tract,

Answer 8

spinal trigeminal nucleus

Question 9

Recent studies of_____________have revealed that the bulk of these fibers arise from the main sensory nucleus and the interpolaris segment of the spinal nucleus.

Answer 9

trigeminothalamic fibers

Question 10

_________constitutes by far the largest component of the cortically originating descending fiber system

Answer 10

corticopontocerebellar tract

Question 11

Second-order neurons from pontine nuclei of the corticopontocerebellar tract cross to the contralateral side of the basis pontis, enter the ______________and project on the cerebellum.

Answer 11

middle cerebellar peduncle (brachium pontis),

Question 12

Some corticobulbar fibers project directly on cranial nerve nuclei (trigeminal, facial, and hypoglossal); the majority, however, project on __________before reaching the cranial nerve nuclei.

Answer 12

reticular nuclei