GRE (Graduate Record Examinations) Psychology Sensation and Perception-Audition Study Material (Page 1 of 1)

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Ear Physiology

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Anatomy

  • External ear: Pinna, Auditory meatus & tympanic membrane
  • Middle ear: Malleus, Incus, Stapes (Ossicles)
  • Inner ear: Semicircular Canals, Cochlea & Organ of Corti
  • Pinna: the outer, visible part of the ear
  • Auditory meatus: the canal of about 55 mm; ends at tympanic membrane/eardrum
  • Tympanic membrane: membrane that vibrates when stimulated by sound waves, sound from here then passed by ossicles.
  • Ossicles: Malleus (Hammer) , Incus (Anvil) & Stapes (Stirrup) are collectively known as Ossicles. Osscicles picks up vibrations from eardreum and transmit to another membrane, oval window.

Mnemonic: “MIS HAS”

M- Malleus;

I- Incus;

S- Stapes;

H- Hammer

A- Anvil

S- Stirrup

  • O…

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Sense Organs: Ear

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Ear

Ear Component, Function and Structure

Ear is the organ of hearing and balance. There are three parts of ear: outer, middle and inner ear.

Internal Structure of the Ear

Outer Ear: It consists of pinna, which is the outermost part of ear and is made of cartilage covered by skin. Outer ear also consists of the helix, antihelix, lobule, tragus, and concha. External auditory canal or tube connects the outer ear to the middle ear. Tympanic membrane (eardrum) divides outer ear from the middle ear and surface area is 50mm2.

Middle Ear: In the middle ear, three bones are connected as Malleus (hammer-shaped) , Incus (anvil-shaped) and Stapes (stirrup-shaped) . These transmit the sound waves to the inner ear. Eustachia…

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