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15 Cards in this Set

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loss of reflex to light (both direct and consensual), with normal pupillary constriction on accommodation and convergence; lesion usually involves pretectum; can be bilateral in disorders like neurosyphilis where the pupils may be small and unequal
Argyll-Robertson pupil
vertical gaze center
periaqueductal gray of the midbrain reticular formation
horizontal gaze center
paramedian pontine reticular formation
the gaze centers have complicated interconnections with cranial nerve nuclei III, IV, and VI via the ______
medial longitudinal fasciculus
the pupil constricts to light (direct response) but may not stay constricted, or may slowly dilate; the consensual response may be faster than the direct (checked with a “swinging” light); seen with irritation of the optic nerve such as occurs in optic neuritis
Marcus Gunn pupil:
Lesions of the medial longitudinal fasciculus can produce _____
“internuclear” ophthalmoplegia: impaired adduction of the ipsilateral eye, nystagmus in the contralateral eye with abduction
Lesions of the medial longitudinal fasciculus can produce an ______; there will be impaired _____ of the ipsilateral eye, nystagmus in the contralateral eye with ____
“internuclear” ophthalmoplegia
adduction
abduction
Name the Special Sensory Afferent cranial nerves
II, VIII
location of second order neurons associated w/ taste
rostral part of the nucleus of the tractus solitarius
General Visceral Afferents nucleus
caudal portion of the nucleus of the tractus solitarius
General Somatic Efferent cranial nerves
III, IV, VI, XII
Special Visceral Efferent nerves
V, VII, IX, X, XI
General Somatic Afferent Cranial Nerves
(III, IV, VI), V, VII, IX, X
3 unique features of olfactory receptos
1. The cells function both as receptors and conducting neurons
2. Unmyelinated axons of these cells constitute the olfactory nerves which pass through foramina of the cribriform plate of the ethmoid bone and enter the olfactory bulb
3. These olfactory neurons undergo mitosis throughout life (they have a life span of approximately 2 mos.); this is interesting since it means that axons of newly born neurons are constantly growing in the olfactory nerves and into the CNS
olfactory projects to what structures in the temporal lobe?
e uncus, entorhinal cortex, and amygdaloid nuclear complex (amygdala)