Tympanic membrane

Ear drum anatomically belongs to
1. External ear
2. Middle ear
3. Inner ear
4. Is a separate entity
Diameter of ear drum is
1. 20 mm
2. 15 mm
3. 10 mm
4. 30 mm
Cone of light is seen in
1. Posterior quadrant
2. Superior quadrant
3. Antero inferior quadrant
4. Posterior inferior quadrant
Umbo
1. Lies at the apex of cone of light
2. Lies at the base of cone of light
3. Lies at the centre of the ear drum
4. Appears a bit retracted
Ear drum is composed of
1. 3 layers
2. 4 layers
3. single layer
4. 2 layers
Embryologically outer layer of ear drum develops from
1. Ectoderm
2. Mesoderm
3. Endoderm
4. All these layers
Bullous myringitis is seen in
1. Middle layer of ear drum
2. Inner layer of ear drum
3. Outer layer of ear drum
4. In all three layers of ear drum
Bullous myringitis is caused by
1. Viral infections
2. Mycoplasma pneumonia infections
3. Streptococcal infection
4. Staphylococcal infection
Name the probable lesion
1. Myringitis granulosa
2. Acute otitis media
3. Chronic suppurative otitis media
4. Glomus tympanicum
Middle fibrous layer is derived from
1. Ectoderm
2. Mesoderm
3. Endoderm
4. All three layers
Handle of malleus lies between
1. Between outer and middle layers
2. Between middle fibrous and inner mucosal layer
3. Lies under the mucosal layer of ear drum
4. Lies entirely within attic
Difference between pars flaccida and pars tensa is
1. Pars flaccida covers the lateral wall of attic
2. Pars flaccida lacks the middle fibrous layer
3. Pars flaccida has all the three layers of ear drum
4. Annulus is absent in the pars flaccida area
Chorda tympani nerve runs between
1. Outer ectoderm and middle fibrous layer
2. Middle fibrous layer and inner mucosal layer
3. Under the mucosal layer
4. On the outer surface of the ectodermal layer
Notch of Rivinus is
1. The area over the superior portion of ear drum
2. This area lacks the annulus
3. This area lacks middle fibrous layer
4. This layer is composed of all three layers of ear drum
This otoscopic finding is a feature of
1. Glomus jugulare
2. CSOM
3. Myringitis granulosa
4. Secretory otitis media
Posterior half of ear drum derives its nerve supply from
1. Maxillary division of trigeminal nerve
2. Auricular branch of vagus
3. Auricular branch of facial
4. Auricular branch of trigeminal nerve
Light house sign is a feature of
1. CSOM
2. Secretory otitis media
3. Acute otitis media
4. Otosclerosis

Tympanic membrane

CME quiz on Tympanic membrane