TEMPORAL BONE, EXTERNAL EAR, and MIDDLE EAR of the Gross Anatomy M1 Gross and Developmental Anatomy 9:00 AM, December 11, 2008 Dr. Milton M. Sholley Professor of Anatomy and Neurobiology 2 Assignment: Head to Toe 2006 • Concerning the material that I will present on the Temporal Bone and Ear, I would recommend that everyone work the following questions from Head to Toe 2006: #7, #10, #65, #88, #97, #100, #104, #118, #121, #157, and #164. By working the questions, I mean that you should read and understand the hints and explanations, even if you get a question correct on your first attempt.
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TEMPORAL BONE,EXTERNAL EAR,
and
MIDDLE EAR
of theGross Anatomy
M1 Gross and Developmental Anatomy9:00 AM, December 11, 2008
Dr. Milton M. SholleyProfessor of Anatomy and Neurobiology
2
Assignment: Head to Toe 2006
• Concerning the material that I will present on the Temporal Bone and Ear, I would recommend that everyone work the following questions from Head to Toe 2006: #7, #10, #65, #88, #97, #100, #104, #118, #121, #157, and #164. By working the questions, I mean that you should read and understand the hints and explanations, even if you get a question correct on your first attempt.
3
Lateral Viewof
Temporal Bonein situ Grant’s Atlas, 12th Ed.
Fig. 7.3A, page 612
4
Temporomandibular Joint (TMJ)
Mandibular fossa-Part of squamous
temporal bone
Disk
Condyloid process (head)of mandible
Grant’s Atlas, 12th Ed.Fig. 7.40A, page 664
Grant’s Atlas, 12th Ed.Fig. 7.46A, page 675
5Plane (coronal) of the cut through the temporal bone as seen on the next slide
Mastoid process
6
Mastoid air cellswithin the mastoidprocess
Sigmoid sinusSuperiorInferior
Petrosal Sinuses
Grant’s Atlas, 12th Ed.Fig. 7.24B, page 642
7
Inferior Viewof
Skullshowing
Temporal Bone(in dark pink)
Petrous portionof temporal bone
Carotid canal
Jugular foramen
8
Foramen ovale
External auditorymeatus
Mandibular fossaCartilagenousauditory tube
Internal carotid arteryentering carotid canal
Jugular foramen
Stylomastoid foramen
Inferior View
Mastoid process
Petrotympanic fissure
Spine of sphenoid
Foramen spinosum
9
The Cartilagenous Auditory TubeOpens into the Nasopharynx
(air can exchange between nasopharynx and the middle ear cavity)
Nasopharynx(space abovethe soft palate)
Soft palate
Opening of auditorytube (Eustachian tube)
Torus tubarius
Grant’s Atlas, 12th Ed.Fig. 7.61, page 694
10
Cartilagenousauditory tube
Tensor velipalatini muscle
Hamulus
Levator veli palatini muscle
Salpingopharyngeus muscle
Palatopharyngeus muscle
Superior pharyngealconstrictor musclePterygomandibular
raphe
11
Cartilagenousauditory tube
Tensor velipalatini muscle
Levator veli palatini muscle
Salpingopharyngeus muscle
Palatopharyngeus muscle
Hamulus
Palatoglossusmuscle
Superior pharyngealconstrictor muscle
12
Superior pharyngealconstrictor muscle
Pterygomandibular raphe
Buccinator muscle
13
Superior Viewof
Cranial Fossaeshows
Petrous Partof
Temporal Bone
Superior faceof petrouspyramid (alsocalled anteriorface)