Sense organs. The Audiovestibular organ 1.Taste buds 2.Audiovestibular nalizator 3.Audiovestibular organ 4.External ear 5.Middle ear 6.Internal ear: a)

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Sense organs. The Audiovestibular organ 1.Taste buds 2.Audiovestibular nalizator 3.Audiovestibular organ 4.External ear 5.Middle ear 6.Internal ear: a) bony labyrinth; b) membranous labyrinth 7. Hair cells 8. Hearing histophysiology

ANALIZATOR sense organ + nerve + cortex (field) Sense organs Primary sensory 1.Eye 2.Smell organ Secondary sensory 1.Ear 2.Taste buds Sensory endings (receptors) 1.Receptor of pain 2.Paccinian body 3.Bulb of Krause

Taste buds

AUDIOVESTIBULAR ORGAN (EAR) External ear Middle ear Internal ear

INTERNAL EAR vestibule+3 semicircular canals +cochlea Bony labyrinth Membranous labyrinth

Maculae

Crista ampullaris

Cochlea axial section

MEMBRANOUS LABYRINTH

Membranous labyrinth (scheme) Vestibular membrane Basilar membrane Stria vascularis

Corti’s organ Outer hair cells Basilar mebrane Tectorial membrane Inner hair cells Hensen cells Stria vascularis Outer phalangeal cells Pillar cells

Corti’s organ Outer cells: A. Supporting 1. Phalangeal (Deyters) 2. Border (Hensen) 3. Outer supporting (Claudius) B. Hair cells (3-5) Tunnel ( pillar cells) Inner cells A. Supporting 1. Phalangeal 2. Inner supporting B. Hair cells (1-2)

Apical portion of outer phalangeal and hair cells

Phalangeal and hair cells (scheme)

Hearing histophysiology Scala vestibuli VM Oval window Round window BsM Cochlear nerve Spiral ganglion

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