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OTD 341 Exam 3 Questions and Answers
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CN I: Olfactory - Answer-Special Sensory, Responsive to chemoreceptors in the nos, vulnerable to damage after a TBI CN II: Optic - Answer-Special Sensory, direct outgrowth of the brain CN III: Oculomotor - Answer-Somatic Motor, small component of parasympathetic fibers. Location: Midbrain ...

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  • October 17, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • otd 341 exam 3 questions and answers
  • cn i olfactory answer special sensory responsi

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OTD 341 Exam 3 Questions and Answers
CN I: Olfactory - Answer-Special Sensory, Responsive to chemoreceptors in the nos,
vulnerable to damage after a TBI

CN II: Optic - Answer-Special Sensory, direct outgrowth of the brain

CN III: Oculomotor - Answer-Somatic Motor, small component of parasympathetic
fibers.
Location: Midbrain

CN IV: Trochlear - Answer-Somatic Motor
Location: Midbrain at the level of superior colliculi

CN V: Trigeminal - Answer-Branchiomeric
Location: Mid Pons

CN VI: Abducens - Answer-Somatic Motor
Location: Caudal Pons

CN VII: Facial - Answer-Branchiomeric
Location: Mid to Caudal Pons

CN VIII: Vestibuloccochlear - Answer-Special Sensory
Formerly called auditory or acoustic nerve

CN XI: Glossopharyngeal - Answer-Branchiomeric
Location: Medulla

CN X: Vagus - Answer-Branchiomeric
Location: Medulla

CN XI: Accessory - Answer-Somatic Motor
Location: very caudal medulla & upper 5 cervical spinal cord segments (anterior horn)

CN XII: Hypoglossal - Answer-Somatic Motor
Location: Medulla

Sclera - Answer-(white outer layer of the eyeball)

Cornea - Answer-Transparent anterior portion of the sclera, lie in front of the iris and
pupil

Choroid - Answer-(middle layer of the eyeball)

, Iris - Answer-Circular structure that forms colored portion of the eye

Pupil - Answer-circular opening in the center of the iris through which light enters

Lens - Answer-(directly posterior to the iris, focuses light rays on the retina) (has ability
to change shape based on how near or far visual stimulus is (accommodation)

Retina - Answer-(inner layer of the eyeball, covers only the posterior half of the inner
eye, direct outgrowth of the diencephalon. Contains sensory receptors for vision
(photoreceptors): rods and cones

Rods & Cones - Answer-Transduce light energy into electrical signals

Rods - Answer-receptors specialized to receive peripheral visual input; function best in
dim light

Cones - Answer-receptors specialized to receive colors and acuity; function best in
bright light

Macula Lutea (macula) - Answer-yellow circular part at the center of the retina important
for central vision

Fovea Centralis (Fovea) means "pit" - Answer-directly in line with our visual axis,
contains primarily cones, area of highest acuity

Optic Disk - Answer-where axons of retinal neurons, called ganglion cell, coverage to
leave the retina to become the optic nerve

Binocular - Answer-Viewed with two eyes

Monocular - Answer-Viewed with one eye

Stereoscopic Vision - Answer-3 - dimensional vision as a product of binocular vision

Retinal Field - Answer-Representation of outside visual field on the retina

Central Visual Field - Answer--Foveal vision, focal vision, or central vision
-Area directly around focal point and area of highest acuity

Peripheral Visual Field - Answer--Areas outside of central visual field; not as good
acuity, but good at movement detection and helps us with balance, movement,
coordination and posture.

Hypothalamus - Answer->inferior to the anterior portion of the thalamus, superior to the
pituitary gland, anterior to the midbrain, and posterior to the optic chiasm

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