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DEPARTMENT OF ANATOMY
Head and Neck
Dr. SREEKANTH THOTA
ALICE IN ANATOMY LAND
EAR
• Do you know Gulliver ?
Participants
• Mr Rabbit.
• Alice.
Anatomy Professor
• Who The _______ is Alice?
Md 1 student
• One day at windsor medical school
• Alice followed the Mr Rabbit to the Garden.
• What was the Mr rabbit saying?
I am late……………. I am late
• They saw 6 small hills in the garden
surrounding a well
• Alice peeped into the well and couldn’t see
the bottom.
• She rubbed her hand over the edge of the well
and heard loud coughing sound
• Mr rabbit jumped to the well and Alice
followed.
After the winding fall
They reached a door.
• Mr Rabbit Opened the Door and Alice
Followed.
• They saw GIANT BLACKSMITH hands coming
from the either wall.
• Right hand he held a hammer.
• Left hand he held a stirrup.
• As ALICE entered he stopped the work and put
the stirrup on the window.
• There was round table on the full of colourful
snakes. Two crawled up the table . One
crawled out.
• A large two headed crawled on the top of one
wall to the other. One head wrapped on the
BLACKSMITH left hand . The other head was
fastened with chord to opposite wall.
• Alice said “ Mr Rabbit this is dangerous place
find exit to get out of here.
escape
• They walked out of the gulliver’s mouth
Ear
Downloaded from: StudentConsult (on 10 December 2006 10:42 AM)
© 2005 Elsevier
EXTERNAL EAR
• Auricle
– Helix
– Antihelix
– Tragus
– Lobule
•
External acoustic meatus - ends proximally at the
tympanic membrane
SENSORY INNERVATION OF THE AURICLE
Congenital microtia , Bifid earlobe , Supernumerary auricle
Cerebrospinal fluid (CSF) otorrhea
Tympanic Membrane
• The tympanic membrane (TM) is an oval, semi-transparent
membrane that separates the external and middle ears.
The orientation of the TM is slightly oblique to the sagittal
plane; the TM is roughly conical, pointing medially. The
handle of the malleus is attached to the medial aspect of
the TM.
• The TM is divided into two parts: the pars flaccida (the
portion superior to the insertion of the manubrium) and
the pars tensa. The point at which the inferior end of the
manubrium inserts into the TM is called the umbo.
Tympanic Membrane Perforation
•
Otoscopic examination
Note: gently
Pull Pinna
Upwards
and Outwards
(directly Down
and
Back in
children)
MIDDLE EAR
• Boundaries and associated structures
– Roof
–
–
–
–
• Tegmen tympani
Floor
Lateral wall
• Tympanic membrane
Medial wall
• Promontory
Anterior wall
• Opening of the pharyngotympanic (auditory) tube
• Tensor tympani m.
– Posterior wall
• Aditus to antrum
– Stapedius m.
• Contents
• Ossicles
– Malleus
• Handle (manubrium)
– Incus
– Stapes
• Base
• Nerves
– Tympanic plexus
– Chorda tympani
• Muscles
– Stapedius m.
– Tensor tympani m.