ear

Question 1

what is ectoderm thickening on the lateral head called?

Answer 1

placode

Question 2

what is the embryologic process for development of inner ear?

Answer 2

Placode–> auditory pit –> auditory vesicle –> membranous ear

Question 3

auditory tube and tympanic cavity are derived from?

Answer 3

first pharyngeal pouch

Question 4

incus is derived from?

Answer 4

dorsal end of first pharyngeal pouch

Question 5

stapes is derived from?

Answer 5

dorsal end of SECOND pharyngeal pouch

Question 6

malleus is derived from?

Answer 6

dorsal end of ventral mandibular cartilage

Question 7

tympanic membrane develops from?

Answer 7

interstitial mesoderm

Question 8

external acoustic canal develops from?

Answer 8

first pharyngeal groove

Question 9

auricle develops from?

Answer 9

groove next to first pharyngeal groove

Question 10

what is another name for the auricle and what is it composed of?

Answer 10

pinna; cartilage

Question 11

what are the 3 extrinsic muscles that position the auricle?

Answer 11

anterior, superior and posterior auricular muscles

Question 12

which extrinsic muscle inserts of the front of the helix?

Answer 12

anterior auricular

Question 13

which extrinsic muscle is the smallest?

Answer 13

anterior auricular

Question 14

which extrinsic muscle is the largest?

Answer 14

superior auricular

Question 15

which extrinsic muscle inserts on the superior side of auricle?

Answer 15

superior auricular

Question 16

which extrinsic muscle inserts on the posterior aspect of the concha?

Answer 16

posterior auricular

Question 17

what are the 6 intrinsic muscles of the ear?

Answer 17

Helicus major
Helicus minor 
Tragicus
Antitragicus
Transverse muscle of auricle 
Oblique muscle of auricle 

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