Bones and Joints of Neck and Head pt. 3 Flashcards
External ear consists of
pinna + external ear canal
External ear canal is from what to what
external auditory meatus to tympanum
Middle ear (Tympanic cavity) is what
small bones that amplify sound waves (osscles)
Malleus is where
Manubrium embedded in tympanum
Stapes footplate contacts the
Oval window of the cochlea
What communicates with the amstoid air cells and by what
Stapes Mastoid antrum (opening)
What regulates pressure in the middle ear like while flying
Nasopharynx through the auditory (Eustachian) tube
Potential paths for infection spread is
in the stapes
Name 4 parts of inner ear
Cochlea
Vestibular organ
Utricle and saccule
Semicirular canales
Inner ear parts are surrounded by bony labyrinth of ___
temporal bone
Cochlea does
Vestibular does what
- hearing
- balance and sense of position and acceleration
What two parts of inner ear have hair cells
Semicircular canals and utricle and saccule
Elevation formed by cartilage of the auditory tube
Torus tubaris
Opening of the auditory tube (pharyngotympanic/eustachian tube) into
nasopharynx
4 parts of mandible
corpus
ramus
lingua
foramina
Corpus does what and way direction
body; suppports the alveolar processes and teeth; horizontal
midline fusion of two halves of mandible, originally a fibrocartilaginous joint (age 1)
mandibular symphysis
Ramus is in what driection and does what
vertical, supports condyle and masticatory muscular attachments
Condyle forms
and neck is where
articulation with the temporal bone
inferior head of the lateral pterygoidi m. attaches
attachment for the temporalis m.
oronoid process
attachment for tehe masseter m. (laterally), and medial pterygoid m. (medially at pterygoid tuberosity)
angle
Attachment for sphenomandibular ligament, landmark for mandibular f.
Lingula
Submandibular muscle attachment sites (3)
- Mylohoid line- mylohoid m.
- Genial tubercle- geniohyoid m. (metnal spine, chin)
- Digastric fossa- digastric m. (anterior belly)
Space inside mandible between mandifbular foramen and mental foramen is
inferior alveolar canal
Mandibular foramen has
inferior alveolar neurovasculature (sensory to lower teeth) (behind lingula)
Mental foramen has
mental n. (sensory to chin)
Temporomandibular Joint is where
beetween condyle (mandible) and mandibular fossa (temporal bone)
Articular disc of TMJ is
dense CT pad between condyle and fossa (and temporal bone)
Articular eminence (temporal bone) prevents what
ANTERIOR dislocation of TMJ
Ligaments and capsule of TMJ do what
stabilize TMJ and hold disc to condyle
Retrodiscal pad of TMJ is what and prevents what
mass of fatty, vascularized tissue behind the joint that prevents POSTERIOR dislocation
TMJ ligaments (4)
Sphenomandibular
Stylomandibular
Capsular/Temporomandibular
Discal ligaments
Sphenomandibular ligament from where to where and does what
sphenoid bone to mandibular lingula
LIMITS INFERIOR DISPALCEMENT OF THE MANDIBLE
Stylomandibular ligament from where to whre and does what
styloid process to mandibuar angle
LIMITS ANTERIOR DISPALCEMENT AND MANDIBULAR DEPRESSION
Capsular/Temporomandibular ligament where to where and does what
mandibular fossa to the mandibular condyle
prevents posterior displacement of the condyle (keeps in place)
Discal ligament does what
holds articular disc to the condyle
Ginglymoarthordial joint is
hinge + sliding joint
TMJ movements is
modified hinge joint
ROTATIONS + sliding
Sliding is
retrusion and protrusion