Flashcards in Osteology exam 2 Deck (93)
Mandible body (corpus or horizontal ramus)
Thick bony part that anchors teeth
On lateral corpus surface. Transmits mental vessels and nerve.
Weak eminence that passes from root of ramus to area at rear of mental foramen.
Gutter between root of anterior edge of ramus and lateral alveolar margin of last molar. Gives rise to buccinator muscle of cheek.
Crosses medial surface of corpus, begining near alveolar margin at last molar position and diminishing as it runs anteroinferiorly. Attachment site for mylohyoid muscle which elevates tongue.
Hollow beneath alveolar portion that runs along medial corpus. Inferior to mylohyoid line. Submandibular gland rests here.
Hollowing beneath alveolar region, superior to mylohyoid line in premolar region. Sublingual gland rests here.
Variably developed thickening of alveolar margin.
Midline surfaces of unfused halves.
Lie near inferior margin of inner surface of anterior corpus. Anchor genioglossal and geniohyoid muscles.
Pair of roughened depressions on posteroinferior aspect of corpus adjacent to midline. Attachment sites for digastric muscles.
Mental protuberance (eminence)
Bony chin at base of corpus. Separated from alveolar margins of incisors by pronounced incurvation.
Thinner than corpus. Articulates with cranial base.
On posterosuperior corner of ramus. Articulates with TMJ.
Justt anteroinferior to condyle. Head of lateral pterygoid muscle attaches to anteromedial surface of neck just below articular surface of confdyle in pterygoid fovea.
Thin and triangular. Recieve insertion of temporalis muscle.
Mandibular notch (incursura)
Notch between condyle and coronoid process.
Angle (gonial angle)
Rounded posteroinferior corner of mandible.
Raised, roughened area at lateral edge of gonial angle where masseter muscle attaches.
Hollowing on lateral surface of gonial angle.
Endocoronoid ridge (buttress)
Vertical ridge extending inferiorly from coronoid tip on inner (medial) aspect of ramus.
Enters bone obliquely, centred in medial surface of ramus. Alveolar vessels and inferior alveolar nerve enter bone here.
Sharp projection at edge of mandibular foramen. Attachment point for sphenomandibular ligament.
Crosses medial surface of ramus, running anteroinferiorly from edge of mandibular foramen. Lodges mylohyoid vessels and nerve.
Interrupt medial surface of gonial angle posteroinferior to mylohyoid groove. Mark insertion of medial pterygoid muscle, an elevator of the mandible.
Body of sphenoid
Midline. Most substantial part. Anterior surface forms superoposterior wall of nasal cavity and articulates with cribriform plate and perpendicular plate of ethmoid. Posteriorly articulates with occipital at sphenooccipital suture. Anteroinferiorly articulates with vomer.
Either side of body of sphenoid. Optic never and opthalmic artery pass through.
Saddle-shaped depression on endocranial surface of sphenoid. Located endocranially,posterior and inferior to optic canals.
Hypophyseal (pituitary) fossa
Deepest depression of sella. Hold pituitary gland.