Homework Flashcards
Which structures are described as the shortest association fibers?
arcuate fibers
Activity in the basal nuclei is regulated by which component of the midbrain?
substantia nigra
Which gray matter component of the medulla oblongata integrates and relays visceral sensory information to autonomic processing centers
solitary nucleus
Which structure is located in the diencephalon?
third ventricle
Superior cerebellar peduncles:
link the cerebellum with the midbrain, diencephalon, and cerebrum.
Which diencephalic structure regulates body temperature by coordinated adjustments in blood flow and sweat gland activity?
preoptic area of the hypothalamus
Which of the following is a secondary brain vesicle that will become the medulla oblongata of the adult brain?
myelencephalon
What is the function of the corticobulbar tracts?
They provide conscious control over skeletal muscles that move the eye, jaw, and face, and some muscles of the neck and pharynx.
Which general sensory receptors are fast-adapting receptors and most sensitive to pulsing or high-frequency vibrating stimuli?
lamellated corpuscles
Which major somatic sensory pathway carries proprioceptive input from Golgi tendon organs, muscle spindles, and joint capsules?
spinocerebellar pathway
Which structure coordinates complex motor patterns through feedback loops?
cerebellum
Which of the following is a characteristic of phasic receptors?
They are normally inactive, but become active for a short time in response to a change in the conditions they are monitoring.
Provides motor control over distal muscles of the upper limbs
rubrospinal tract
Which major somatic sensory pathway carries pain and temperature sensations?
lateral spinothalamic tract of the spinothalamic pathway
Gustatory information reaches the brain by way of cranial nerve
IX
Difficulty in swallowing may be a sign of damage to which cranial nerve(s)?
vagus and glossopharyngeal
The Roman numeral V indicates the ________ nerve.
trigeminal
Which of the cranial nerves originate in the nasal cavity?
olfactory nerve
Olfactory receptors send axons through the cribriform plate and synapse on neurons in the
olfactory bulbs
Which of the cranial nerves is named for the fact that it “wanders,” that is, innervates structures throughout the thorax and abdomen?
vagus nerve (X)
Which of the following symptoms would you associate with damage to the spinal accessory nerve?
weakness of the sternocleidomastoid muscle
The cranial nerve that has three major branches is the
trigeminal
The Roman numeral VIII indicates the ________ nerve.
vestibulocochlear
The dorsal ramus:
innervates the muscles, joints, and skin of the back
Which is the innermost connective tissue layer of the spinal nerve that surrounds each axon?
endoneurium
Which is correct regarding the spinal cord?
The adult spinal cord ends between vertebrae L1 and L2
Motor commands are conveyed to the spinal cord by which of the following?
descending tracts
The dorsal and ventral roots of spinal segments L2 to S5 and the filum terminale together form a complex called the:
cauda equina
Which is the middle meningeal layer that includes a simple squamous epithelium and a network of collagen and elastic fibers, creating a space between it and the inner meningeal layer?
arachnoid mater
Define gray matter in the spinal cord.
It is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmyelinated axons, and it surrounds the narrow central canal
Which structure lies between the pedicles of the adjacent vertebrae?
dorsal root ganglion
The posterolateral and anterolateral regions of the antebrachium are monitored by which dermatome(s)?
C6
What is the function of denticulate ligaments?
They prevent lateral movement of the spinal cord
Which innervated region of the ascending tracts that provide sensations in the posterior white column is located most medial in the spinal cord?
leg
Which spinal cord structure contains somatic motor nuclei?
anterior gray horn
