'Scala vestibuli' diaporamas de présentation

Chapter 7 The Other Sensory Systems

Chapter 7 The Other Sensory Systems. Audition. Our senses have evolved to allow us to detect and interpret biologically useful information from our environment . However, we do not detect all sensory information in the world. Some sensory information lies beyond our ability to detect it.

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Audition

Audition. Sound. Any vibrating material which can be heard. Three aspect of sound. Sound production Sound transmission Sound analysis. Physical definition of sound. Sound is a stimulus that has the capability for producing and audible sensation.

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The Special Senses

A. Visual sensations 1. Accessory structures of the eye 2. Anatomy of the eyeball a. Fibrous tunic b. Vascular tunic c. Retina (nervous tunic) d. Lens e. Interior of the eyeball 3. Image formation

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Inner Ear

Inner Ear. Overview Cochlea Organ of Corti Hair Cells Basilar Membrane. Inner Ear. Inner Ear. Membranous Labrynth. Cochlea. Spiral - turban shaped In humans Two and a half turns 35 mm long 5 mm high 9 mm diameter at base but becomes narrower at apical end. Cochlea. Cochlea.

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Special Senses

Special Senses. I. Eye A. Accessory Structures. 1. Eyebrows a. Sunshades b. Keep perspiration out 2. E yelids or palpebrae a. Protective reflex b. Blinking spreads tears c. Eye lashes and ciliary glands (sweat glands)

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INNER EAR

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Innervation Anteriorly auriculotemporal nerve V3 posterior superior CN 7

EAC -2.5 cm long S-shaped curved anteriorly -lateral 1/3 cerumen cartilaginous -resonance at 3500 Hz, gain of 15 dB for adults *resonance is 8000Hz for baby until 2.5 years of age. Innervation Anteriorly auriculotemporal nerve V3 posterior superior CN 7

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Scala vestibuli

Oval window. Frame:. High pitch. Low pitch. A,. B,. C,. D,. E. Scala vestibuli. Scala media (endolymph). Round window. Scala typmpani. Perilymph. I,. J,. K,. L,. M. Panel A. , B,. C,. D,. E,. F,. G,. H,. Auditory Association Cortex. Primary Auditory Cortex.

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