Temporal fossa Flashcards
Muscles of mastication: name
Temporalis
Masseter
Lat. pterygoid
Med. pterygoid
Temporalis muscle: origin, insertion, innervation, blood supply + function
Origin = temporal fossa Insertion = coronoid process mandible Deep temporal nerves from V3 Deep temporal a. from maxillary a. Elevation + retraction mandible
Masseter muscle: origin, insertion, innervation, blood supply + function
Origin: *superficial = maxillary process of zygomatic + zygomatic process of maxillary *deep = med. aspect zygomatic arch Insertion: *superficial = angle mandible *deep = upper + central parts ramus Masseteric n. from V3 Masseteric a. from maxillary a. Elevation + retraction
Lateral pterygoid muscle: origin, insertion, innervation + function
Origin:
*sup. head = greater wing sphenoid (roof of infratemporal)
*inf. = lat. plate pterygoid process of sphenoid
Insertion = pterygoid fovea of neck
Nerve to lat. pterygoid, from V3
Protrusion
Medial pterygoid muscle: origin, insertion, innervation + function
Origin: *superficial = tuberosity of maxilla *deep = lat. plate pterygoid process Insertion = med. aspect of angle Nerve to med. pterygoid Elevation, assits lat. in protrusion
Temperomandibular joint: function, type + where it is formed
Open + close mouth, side-to-side movements of lower jaw
Synovial
Btw. head mandible + articular fossa temporal bone
Temperomandibular joint: articular disc
Divides joints
Lower = hinge-like depression + elevation
Upper = protrusion of head onto articular tubercle + retraction into mandibular fossa
Articular = fibrous cartilage + non-articular = synovial membrane
Temperomandibular joint: name extracapsular ligaments + which ones are direct stabilizers?
Lateral ligament
Sphenomandibular
Stylomandibular
Lat. + spheno = direct - make contact with joint
Temperomandibular joint: lateral ligament
Closest
Articular tubercle to neck
Temperomandibular joint: sphenomandibular ligament
Medial to joint
Sphenoid bone to lingula on med. ramus
Temperomandibular joint: stylomandibular ligament
Styloid process of temporal to angle of mandible
Temperomandibular joint: name movements
Depression
Elevation
Retraction
Protrusion
Temperomandibular joint: depression
Digastric
Geniohyoid
Mylohyoid
Temperomandibular joint: elevation
Temporalis, ant. fibres
Masseter
Med. pterygoid
Temperomandibular joint: protrusion
Lat. pterygoid
Assisted med. pterygoid
