Head: Ear Flashcards
1
Q
Ear is involved with
A
- Hearing
- Equilibrium
2
Q
3 parts of the ear
A
- External ear
- Middle ear
- Internal ear
3
Q
Internal ear contains
A
- Receptors for hearing and balance
4
Q
External ear contains
A
- Auricle
- External acoustic meatus
- Tympanic membrane
5
Q
Auricle
A
- Visible portion of ear
- Elastic cartilage
6
Q
External acoustic meatus
A
- Ear canal, from auricle to tympanic membrane
- 2.5 cm in length
- S-shaped
7
Q
Tympanic membrane
A
- Separates external from middle ear
- Moves in response to sound waves
- Vibrations transferred to auditory ossicle
8
Q
Middle ear contains
A
- Auditory ossicles (malleus, incus, stapes)
- Stapedius and tensor tympani muscles
- Chorda tympani nerve (branch of facial nerve)
- Tympanic plexus
9
Q
Tympanic cavity is found within
A
- The petrous part of temporal bone
10
Q
Tympanic cavity communicates with
A
- Nasopharynx via pharyngotympanic tube (equalizes pressure)
- Mastoid air cells via mastoid antrum
11
Q
External ear innervation
A
- Great auricular (C2,3)
- Lesser occipital
- Auriculotemporal (branch of V3)
- Vagus and facial cranial nerves
12
Q
External acoustic meatus and external tympanic membrane innervations
A
- Auriculotemporal (V3)
- Facial nerve
- Vagus nerve
13
Q
Middle ear and internal part of tympanic membrane innervation
A
- Glossopharyngeal nerve (tympanic plexus)
14
Q
External ear and external acoustic meatus arterial supply
A
- Posterior auricular
- Superficial temporal
- Deep auricular
15
Q
Middle ear arterial supply
A
- Anterior tympanic,
- Posterior auricular
- Middle meningeal
