Test 3 Practice Questions Flashcards
Nerve fibers of solitary tract…
Serve as afferent limb of a variety of reflexes including those that modulate cardiac and respiratory fxn.
What nucleus receives all taste input?
NTS
Which is not a part of auditory pathway?
- lateral lemniscus
- superior olivary nucleus
- Superior Colliculus
- Transverse temporal gyrus
Superior Colliculus
What is the receptor organ for dynamic equilibrium?
Christa
The functional component of Parasympathetic neurons is…
GVE
What is the ascending pathway for the conscious awareness of pain originating from the eybrow?
Ophthalmic Nerve- trigem. ganglion- spinal trigem nucleus- primary sensory area
Ascending fibers of the medial longitudinal fasciculus end in the ___
oculomotor nuclei
Which pair of nerves innervate the tensor tympani and stapedius muscle?
Trigeminal and facial
WHere is the spiral organ (of corti) located?
Cochlear duct
Which CN does not have a parasympathetic component?
Vestibulocochlear
3 of the following nerves have similar fxn. Which is different?
- Facial
- Vagus
- Glossopharyngeal
- Trochlear
Trochlear
Which bundle of nerve fibers contains the central branches of the primary sensory neurons that provide for general sensation (not taste) from the posterior third of the tongue?
Spinal trigeminal tract
What statement is true?
a. crossing of ascending fibers at more than one level provides exclusive representation of the contralateral cochlea in the primary auditory cortex
b. there are both crossed and uncrossed ascending auditory fibers in in the pons and midbrain
c. all ascend central axons in the auditory pathway cross the midline in the medulla
d. no ascending central axons in the auditory pathway cross the midline at any level.
b. there are both crossed and uncrossed ascending auditory fibers in in the pons and midbrain
Which is involved in the pupillary light reflex?
a. lateral lemniscus
b. optic ganglion
c. cilliary ganglion
d. oculomotor muscles
C. Cilliary ganglion
How many functional components are in the brainstem?
7
What is the fluid inside of scala media?
Endolymph
What muscle is supplied by the sixth cranial nerve?
a. superior oblique
b. inferior oblique
c. medial rectus
d. lateral rectus
D. Lateral Rectus
Which functional componenet do the trochlear, oculomotor, and hypoglossal nerves have in common?
GSE
Where are the motor neurons that innervate the larynx and pharynx located?
Nucleus ambiguus
Which is the major decussation of the auditory pathway?
Trabezoid Body/fibers
The cochlear nuclei…
a. are located beneath the floor of the fourth ventricle
b. project ipsilaterally to the auditory cortex
c. receive afferents from the vestibular ganglion
d. receive afferents from the spinal ganglion
d. receive afferents from the spinal ganglion
Where might a lesion cause loss of taste?
Solitary tract and nucleus
Which cranial nerve carries taste sensation from the back of the throat, including the epiglottis?
Vagus
Which group of nerves contain the special visceral afferent functional component?
a. facial, olfactory, vagus
b. glossopharyngeal, vagus, hypoglossal
c. glossopharyngeal, trigeminal, abducens
d. trigeminal, facial, oculomotor
a. facial, olfactory, vagus
What gyrus is the auditory cortex?
Transverse temporal
What branch of the trigeminal nerve carries motor fibers
Mandibular
Olfactory epithelia contain which types of cells?
Bipolar
Olfactory glomeruli receptor axons synapse where?
Olfactory Bulb
Olfactory tract contains what type of cells?
Mitral Cell Axons
What functional component are parasympathetic nerves?
GVE
What functional component do CN 3, 6 and 12 share?
GSE
Shine a light in right eye but left pupil does not respond. Which nerve is damaged?
Left Oculomotor N.
Corneal blink reflex involves?
CN trigeminal(afferent) and CN facial (efferent)
A lesion to what area will cause a loss of taste.
Nucleus Solitaris
Fovea contains what type of cells?
Cones
Olfactory cells axons are made of what type of cell?
Mitral Cell
What olfactory striae is contralateral?
Medial
Which olfactory striae is involved in conscious perception of smell?
Intermediate Olfactory Striae
What is not part of the auditory pathway?
Inferior Auditory nucleus
Lateral Rectus is innervated by…
Abducens N
When looking to the right you activate?
Right Abducens and left occulomotor N
Which statement is true?
This shit sucks.
Pharyngeal and laryngeal muscles are innervated by fibers originating in the ?
Nucleus Ambiguus
Where do olfactory cells cross?
Anterior Commissure
What innervates muscles of mastication?
Trigeminal
Nystagmus, cold/warm water in ear? <— WTF?
Cilliary ganglion
Nerves involved in SVA
I, VII, X
Two nerves involved in the corneal blink reflex?
Trigeminal and facial
Examples of photoreceptors
Rods and cones
What part of the visual system contains photoreceptors?
Retina
Concentration in the fovea?
Cones
What is not true of solitary tract?
Goes to anterior 1/3 of tongue for taste
it goes to POSTERIOR 1/3
What do these have in common (Oculomotor, Hypoglossal, and Trochlear nerves)?
GSE
What is the sensory organ for dynamic equilibrium?
Cristae
Which is NOT a direct target of axon cells?
Visual Cortex
Where do ganglia cells NOT terminate?
Visual Cortex
Ascending Medial Longitudinal fasciculus ends in
Oculomotor Nucleus
What the solitary conveys
Afferent limb of reflexes and modulates cardiac and respiratory function
Tensor tympani innervated by
V3 Mandibular
Hyoglossus innervations?
Hypoglossal N
Temporal lobe includes..
auditory cortex
Which bundles of Nerve Fibers contains central branches of primary sensory neurons that provide for general sensations from posterior 1/3 of the tongue?
Spinal Trigeminal Tract
72 year old lady with history of cardiovascular disease has sudden onset confusion during which her left arm and leg became weak. Weakness was most likely due to damage to which of the following?
Right Internal capsule
Muscles of the pharynx, palate, and upper esophagus are innervated by
vagus
These neurons are replaced about every 2 months
Olfactory
Olfactory glomeruli contain fibers from all except?
Granule cells
Photoreceptors activated by dim light
Rods
Olfactory tract is outgrowth from?
Telencephalon
Optic tract is outgrowth from?
diencephelon
Which system cant be mapped in the brain?
Olfactory
Where is vestibular nucleus?
Beneath lateral part of fourth ventricle
Where do axons containing olfactory nerves end by synapsing with other neurons
Glomeruli of Olfactory bulb
Which of following sequences mist accurately summarizes some of central connections of olfactory system?
Olfactory epithelium–> tract –> bulb
Functional component associated with cell bodies located in visceromotor ganglia are
GVE
Cochlear nerve receives __ from __
afferents
spinal ganglion
Where are receptor cells that initiate reflex nystagmus when external ear is irritated from cold or warm water?
Ampulla of lateral semicircular duct
Where would lesion cause blindness in right halves of visual fields of both eyes?
Left Optic Tract
