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Document technical information

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First found May 22, 2018

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Category Also themed
Language
English
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not defined
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Transcript

Special sense
I – VISION
Visual pathway
• Lesion in optic nerve leads to loss of vision on the
same side of lesion
• optic tract:
*Left optic tract is responsible for vision in nasal
half of left visual field and temporal half of right
visual field
*right optic tract is responsible for vision in nasal
half of right visual field and temporal half of left
visual field
II- HEARING
Auditory pathway
• External ear: collect sounds & direct it to
tympanic membrane
• Middle ear: sounds vibrate the tympanic
membrane then transmitted to auditory
ossicles
• Types of conduction:
1- ossicular conduction
2- air conduction
3- bone conduction
• Austachian tube: responsible for equalizing
pressure on either side of tympanic
membrane
III- TASTE
• Taste buds situation
Taste pathway
• Taste sensation
IV- SMELL
Smell pathway
Vision
Hearing
Smell
Taste
Receptor
Rods & cons
Hair cell in organ of
corti
Olfactory receptor
Taste buds
Site
In retina
Inner ear
Nose
Tongue
Nerve
Optic nerve
Auditory nerve
“vestibulocochlear “
Olfactory nerve
*Anterior 2/3 of
tongue: fibers of
facial nerve
*Posteior 1/3 of
tongue:
glossopharyngeal
nerve
*Vagal fibers
from other
regions
Relay in
thalamus
Relay in
thalamus
Relay
Not relay in
thalamus
Relay
Cerebral
cortex
Occipital role Temporal lobe
Olfactory cortex
includes structures
Parietal lobe
×

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