1. WINDSOR UNIVERSITY SCHOOL OF MEDICINE
DEPARTMENT OF ANATOMY
Head and Neck
Dr. SREEKANTH THOTA

2. Ear

3. Downloaded from: StudentConsult (on 10 December 2006 10:42 AM)
© 2005 Elsevier

4. EXTERNAL EAR
Auricle
Helix
Antihelix
Tragus
Lobule
External acoustic meatus - ends proximally at the tympanic membrane

7. SENSORY INNERVATION OF THE AURICLE
MAJOR BLOOD SUPPLY
POST AURICULAR AND SUPF TEMP ARTERIES
V3 TRIGEM BRACNH, MANDIBULAR NERVE
AUREICULAR TEMP AND GREAT AURICULAR NERVE (CRANIEAL NERVES)
VAGUS ALSO POST PART OF EXT AUDI MEATUS

8. Congenital microtia , Bifid earlobe , Supernumerary auricle Congenital microtia , Bifid earlobe , Supernumerary auricle

9. Cerebrospinal fluid (CSF) otorrhea

10. 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.

13. Tympanic Membrane Perforation

14. Otoscopic examination
Note: gently
Pull Pinna
Upwards
and Outwards
(directly Down
and
Back in children)
PINNA UPWARD AND OUTWARD WARDS
CHILDREN DOWN AND BACK B/C CURVED BACKWARD DIFF

15. 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.

17. Contents Ossicles Nerves Muscles Malleus Incus Stapes Tympanic plexus
Handle (manubrium)
Incus
Stapes
Base
Nerves
Tympanic plexus
Chorda tympani
Muscles
Stapedius m.
Tensor tympani m.