CNS 3.0 Flashcards
(49 cards)
Which is not part of the epithalamus?
A. Reticular nucleus
B. Pineal gland
C. Stria medullaris thalami
D. Habenula
A. Reticular Nucleus
Epithalamus contains 3 main structures:
-Pineal Body (not related to other 2 structures). Produces and secretes melatonin. The suprachiasmatic nucleus signals pineal body about light/dark cycle
-
How many functional components are in the brainstem?
A. 4
B. 5
C. 6
D. 7
D. 7
Parallel fibers come from which of the following?
A. inferior olivary neurons
B. Purkinje cells
C. Precerebellar nuclei
D. Granule cells
From Purkinje cells
Ameripress:
“Fiber to pukinje cell
-Parallel Fiber
–Granule cell axon”
What is the most rostral part of the CNS?
A. medulla
B. Diencephalon
C. Pons
D. Telencephalon
D. Telencephalon
Which transmitter influences movement?
A. ACh
B. Adrenaline
C. Dopamine
D. Seratonin
ACh
- Dopamine influences decision making and motivation
- Serotonin influences awareness and attention & mood/decreased pain
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?
A. Hypoglossal nerve
B. Spinal Trigeminal tract
C. SOlitary tract
D. Medial longitudinal fasciculus
Solitary tract
-Functional component of Glossopharyngeal Nerve
Hypoglossal moves tongue
Parasympathetic preganglionic neurons to the heart are located in the
A. Dorsal motor nucleus of vagus
B. Nucleus ambiguus
C. Spinal accessory nucleus
D. Spinal trigeminal nucleus
Nucleus Ambiguus
Which cerebellar pathway has fibers that cross?
Anterior spinocerebellar
Cuneospinocerebellar
Rostral spinocerebellar
Posterior spinocerebellar
Anterior Spinocerebellar
A receptor that monitors events within the body is called?
A. Proprioceptor
B. Exteroceptor
C. Enteroceptor
D. Merkel Cell
Enteroceptor
- Merkel Cell monitors differences in touch
- Follicular monitors light touch (hair).
- Encapsulated
- -Meissner’s=light touch
- -Ruffini’s=shearing or drag
- -Pacinian=vibration
Where are the cell bodies of the neurons whose axons form olfactory nerve?
A. In various nuclear groups within anterior perforated substance
B. In olfactory bulb
C. In olfactory epithelium
D. In none of the above
B. Olfactory Bulb
Which nucleus is in the midline?
A. Medial
B. Raphe
C. Central
D. Paramedian
Raphe AKA median region
Where are descending upper motor fibers found?
A. Cerebral peduncle
B. Pyramid
C. Internal capsule
D. All of the above
D
Why are the neurons of the olfactory epithelium unique?
A. Only neurons that continue to be produced and are regularly replaced throughout adult life
B. Only primary sensory neurons to have axons that end in the CNS
C. their axons have the fastest known conduction velocities
D. they generate impulses in response to tactile stimulation of the skin of the nose
A. Only neurons that continue to be produced and are regularly replaced throughout adult life
Which cranial nerve carries taste sensations from the back of the throat, including the epiglottis?
Facial
Vagus
Glossopharyngeal
Hypoglossal
Vagus
Which functional component do trochlear, oculomotor and hypoglossal nerves have in common?
A GSE
Oculomotor, trochlear (& Adbucens) innervate eye muscles and Hypoglossal innervates tongue muscles
Pelvic splanchnic nerves are composed of ___ fibers.
A. sympathetic preganglionic
B. Sympathetic postganglionic
C. Parasympathetic preganglionic
D. Parasympathetic postganglionic
C. Parasympathetic preganglionic
Which fiber is stimulated by stretching the muscle spindle?
II
IA
Gamma
Alpha
Alpha
How much CSF is flowing through the ventricles, subarachnoid space and cisterns at any given time?
1L
800 mL
150 mL
35 mL
150 mL
Which pair of nerves innervate the tensor tympani and stapedius muscles?
A. Chorda tympani and tympanic nerve
B. auditory and glossopharyngeal nerve
c. Trigeminal and facial
D. Vagus and accessory
C. Tigeminal (tensor tympani) and facial (stapedius)
Where is spiral organ of Corti located?
Cochlear duct
If a die, which is a very large molecule, is administered intravenously, it will strain neurons in what location?
A. Circumventricular organs
B. Amygdala
C. Paraventricular nucleus
D. Corpus striatum
A. Circumventricular organs
-Controls osmolality>vasopressin and oxytocin
——————————————
Amygdala central function: posture, cognitive, endocrine, reticular formation modulation
Paraventricular - sits on either side of 3rd ventricle
The vestibular system is connected ipsilaterally with which part of cerebellum?
Paravermal area
Flocculonodular lobe
Neocerebellum
Vermis
B. Flocculonodular Lobe
The cerebral aqueduct is located in the ____
A. Pons
B. Diencephalon
C. Midbrain
D. Medulla oblongata
C. Midbrain
Which are derivatives of neural crest cells?
Glial cells of CNS
Cerebral cortex
motor neurons
sensory neurons
Sensory neurons (?)
