Anatomy Final

• Stirrup


  Attaches to the oval window
• Membranous labyrinth


  • Cochlear duct
  • Saccule
  • Utricle
  • Ampullae
  • Semicircular ducts
• Optic disc


  Medial to the macula lutea
• Afterimage


  Image persists in one's mind although the stimulus no longer exists
• Spiral organ


  Rests on the basilar membrane
• Crista


  Sensitive to rotational movements and is located inside an ampulla of the inner ear
• The vestibular membrane is not located within the inner ear's vestibule
• Rhodopsin


  The most abundant photopigment in the eye and consists of scotopsin and vitamin A
• Referred pain


  Felt due to sensory impulses from different regions sharing common ascending tracts
• Fovea centralis


  Within the macula lutea
• Rhodopsin


  Contains retinal and scotopsin
• 20/10 vision


  Better-than-average vision
• Dark adaptation


  Takes longer than light adaptation
• High frequency sound


  Has short wavelengths
• Eye convergence


  Increases as you continue to stare at an object moving closer
• Organ of Corti


  Lies on the basilar membrane
• Vascular tunic


  • Ciliary body
  • Choroid
• Otoliths are located deeper in the head than ossicles
• There are only three types of cones in the retina
• Basilar membrane


  Forms the base of the scala media
• The inner ear's vestibule does not contain ampullae
• Perilymph does not move the tectorial membrane
• Photoreceptors


  Hyperpolarize when light of certain intensity strikes them
• Ciliary muscle


  Moves anteriorly when viewing objects moving closer to the eye
• Conjunctiva


  Prevents contact lenses from getting behind the eyeball
• Pupil diameter


  Positively related to radial muscle tension in the iris
• Scotopsin


  Smaller than rhodopsin
• Ear ossicles include the malleus
• Fovea centralis


  Located lateral to the optic disc
• The vestibular membrane is in direct contact with perilymph
• Saccades


  Jerky movements of the eyes while attempting to scan the visual field
• Tarsal plate


  Provides rigidity to the palpebrae
• Aqueous humor movement


  Moves anteriorly through the pupil and drains into the blood at the canal of Schlemm at the edge of the iris
• Depolarizing photoreceptors


  Release inhibitory neurotransmitters onto bipolar cells
• Staring at an object moving closer to the eye

  Causes the pupil to constrict
• As an image moves closer to the eye

  The pupils will constrict
• The scala media does not entirely separate the scala vestibuli from the scala tympani
• Pushing the tympanum inward


  Holding the nose and forcing air through the Eustachian tube could push it outward
• Tragus


  Part of the external ear
• Perilymph does not move otolithic membranes