Block 7 Ear
Last Modified: 2013-02-03
- The cochlea, dedicated to hearing and the vestibular tube which is dedicated to balalce.
2. Cochlear portion - sensory for sound
-similar to cerebral spinal fluid
Only communication between 2 parts of the cochlea
converts sound waves to nerve impulses - > then transmit to cerebral cortex for interpretation
- consists of semicircular canals, their ampullas and utricle and saccule.
- These are all involved in the sense of equilibrium.
- Each of the inner ear regions contains mechanoreceptors.
- the porous, perforated bony core of the cochlea
- what the cochlea wraps around
- adds protection to the blood vessels
2. Otic ganglion - located lateral to the wall of the auditory tube. (also innervates parotid salivary gland)
Middle ear: endoderm of 1st pharyngeal pouch
Inner ear: ectoderm - otic placode
-enters internal auditory meatus
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