𝟏𝟒. 𝐄𝐚𝐫 (𝐄𝐱𝐭𝐞𝐫𝐧𝐚𝐥, 𝐦𝐞𝐝𝐝𝐥𝐞, 𝐚𝐧𝐝 𝐢𝐧𝐧𝐞𝐫 𝐞𝐚𝐫)

This video describes the parts, boundaries, ossicles, muscles, and nerves of the ear (including MCQ, practical, and interactive questions).

Chapters (timestamps):
00:00 - Intro
01:38 - Ear
02:45 - External ear
03:00 - Auricle
03:55 - External auditory meatus
05:50 - Tympanic membrane
08:16 - Function
10:17 - Middle Ear
10:40 - Site
11:50 - Shape
12:23 - Boundaries
24:12 - Ossicles
26:49 - Muscles
29:10 - Innervation
29:40 - Auditory tube
34:25 - Function
35:48 - Inner Ear
36:02 - Site
36:37 - Parts
37:17 - Bony labyrinth
38:14 - Membranous labyrinth
41:08 - Function
48:07 - MCQ
50:55 - Practical questions
53:48 - Interactive questions

1. The external acoustic meatus is composed of which of the following parts?
A. Bony canal
B. Cartilage
C. Lateral third is cartilaginous while its medial two-thirds are bony
D. Medial third is bony while its lateral two-thirds are cartilaginous

2. Otoscopic examination of the tympanic membrane shows which of the following findings?
A. Cone of light
B. Pars tensa
C. Pars flaccida
D. Tympanic cavity

3. Which nerve runs in the middle layer of the tympanic membrane?
A. Tympanic branch of glossopharyngeal nerve
B. Chorda tympani
C. Auricular branch of vagus
D. Facial nerve

4. The lateral wall of the middle ear is formed by which structures?
A. Eardrum
B. Facial canal
C. Cochlea
D. Footplate of the stapes

5. The internal carotid artery is related to which of the following walls of the middle ear?
A. Anterior
B. Posterior
C. Floor
D. Roof

6. The internal jugular vein is related to which of the following walls of the middle ear?
A. Anterior
B. Posterior
C. Floor
D. Roof

7. Aditus to mastoid antrum is present in which of the following walls of the middle ear?
A. Anterior
B. Posterior
C. Floor
D. Roof

8. What is the nerve supply of tensor tympani?
A. Mandibular nerve
B. Facial nerve
C. Vagus nerve
D. Glossopharyngeal nerve

9. What is the nerve supply of tensor tympan stapedius?
A. Mandibular nerve
B. Facial nerve
C. Vagus nerve
D. Glossopharyngeal nerve

10. Hyperacusis occurs in paralysis of which of the following nerves?
A. Mandibular
B. Facial
C. Vagus
D. Glossopharyngeal

11. The pharyngotympanic tube connects the middle ear cavity with which of the following structures?
A. Oropharynx
B. Nasopharynx
C. Nasal cavity
D. Laryngopharynx

12. A 13-year-old girl went to the physician suffering from sore throat, high fever, and ear pain. On examination, she had severe swollen palatine tonsils. She was diagnosed as tonsillitis. The infection spread from the pharynx through the auditory tube to the tympanic cavity. The infection would reach at first which of the following walls of the middle ear?
A. Anterior
B. Posterior
C. Medial
D. Lateral

13. A 44-year-old man presents with a loss of facial expression and an inability to close his eye on the right side. The corner of the mouth deviates to the left side. The physician performs a hearing test and detects hyperacusis on the right side. Which of the following muscles are most likely to be affected?
A. Tensor tympani
B. Stapedius
C. Salpingopharyngeus
D. Tensor palati

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#ear
#tympanic_membrane
#labyrinth