click below
click below
Normal Size Small Size show me how
Neurology Exam 2
Term | Definition |
---|---|
Prosody | rhythm and intonation of speech -located in non-dominant hemisphere -other aspects of speech are in dominant hemisphere |
Asteriognosis | stroke involving left parietal association cortex -on R hand will be asteriognosis -due to lesion in parietal association cortex; particularly the superior parietal in the dominant hemisphere |
Primary gustatory area | Location: frontoparietal operculum and the adjacent part of the insula |
Cribform plate of the ethmoid bone | Head injury following automobile accident -fractures to basilar skull -no sense of taste -no sense of smell |
Taste sensations transmission posterior 1/3 of tongue | by ipsi glossopharyngeal nerve (VIII) |
Tongue anterior 2/3 | innervated by Accessory nerve (VII) |
Where is the location of the taste buds? | epiglottis and palate (X) |
Damage to solitary tract or nucleus: | complete loss of taste sensations on side of injury |
Primary olfactory area includes: | uncus adjacent piriform cortex entorhinal cortex |
Primary olfactory area unlike other cortical sensory areas... | receives only ipsi olfactory impulses |
Night blindness | associated with deficiency of Vitamin A |
Vitamin A | aids in restoration of the photopigment rhodopsin in the rods |
Primary Visual Cortex | neurons transform this input to lines or bars of different orientations |
Primary Olfactory area includes: | - uncus -adjacent piriform cortex -entorhinal cortex |
Primary olfactory cortex differs from other sensory areas how? | receives only ipsilateral olfactory impulses |
Primary gustatory area is located where? | frontoparietal operculum and the adjacent part of the insula |
Cribform plate of ethomoid bone | head injury: -factures to basilar skull -no taste -no smell |
Cataract | opacification of the lens |
Opacification of the lens causes what? | interference with light rays passing through the lens |
Color blindness | associated with absence of the red, green, or blue sensitivity photopigments in cones |
Retinal and Lateral geniculate nucleus | respond to focused spots of light with on-center or off-center response properties |
Cranial nerves and parts of the brain | are essential for integrity of direct & consensual light reflexes |
Direct reflexes | ipsilateral optic and occulomotor nerves |
Consensual reflexes | ipsilateral optic nerves and contralateral occulomotor nerves |
Limbic system | limbic lobe and various structures that are associated with the consolidation of memory, behavior, emotions |
Two key functional centers of the limbic systems | amygdala and hippocampus |
Klüver-Bucy syndrome | Bilateral alterations in the amydalae |
Amydala | strongly associated with fear |
Fear and anxiety disorders are mostly likely associated with what? | amygdala |
Equillibrium and visual fixation | chiefly associated with structures in the internal ear |
Sensation of head movements | arise from visual system, neck afferents, and semicircular ducts of vestibular systems |
Abnormal sensation of head movements present when: | head is still and eyes are closed -abnormal impulses must be originating from semi-circlular ducts |
sensory and motor abnormalities involving left side of body and face | impairment of vision on left field of vision |
Single lesion in Right posterior limb of internal capsule | L. hemianesthesia L. spastic hemiplegia L. homonymous hemianopsia |
Right Loop of Meyer damage | -gradual loss of visual sensations from limited area of visual field -temporarily staggered neuroimaging reviews slow enlarging mass in right temporal lobe white matter |
Lesion in the Optic Tract | HH homonymous hemiahopia absence of direct & consensual pupillary light reflexes upon shine of pinpoint light beam onto blind half of either retina |
Detachment of Retina | occurs between pigment layer and photo receptor layer -detached part stops functioning because rods and cones are metabolically dependent on pigment cells |
Anterior Cranial fossa Tumor -Anosmia | -gradual and prolonged loss of smell -no chronic nasal congetstion -minimal clear, runny discharge -no head injury |