Presentation on theme: "11 The Skull and Cranial Bones. Terms: Prominences Tuberosity = Rounded prominence, often rough (e.g., maxillary tuberosity) Process = Prominence or extension."— Presentation transcript:
11 The Skull and Cranial Bones
Terms: Prominences Tuberosity = Rounded prominence, often rough (e.g., maxillary tuberosity) Process = Prominence or extension on a bony surface Condyle = Oval prominence typically found at articulations Others: Tubercle, cornu, epicondyle, eminence, arch, line, spine, crest.
8 Terms: Openings, Depressions, and Hollows Foramen = Short, window-like opening in bone (or tooth) Canal = Longer, tube-like passage in bone (e.g., auditory canal, mandibular canal). Meatus is a type of canal.
8 Terms: Openings, Depressions, and Hollows Fossa = depression on a bony surface, shallow (as in the temporal fossa) or quite deep (as in the pterygopalatine fossa) Fissure = A narrow, cleftlike opening (pterygomaxillary fissure) Others = Aperture, notch (incisura), sulcus, ostium
8 Terms: Articulations Articulation = the connection between two bones. May be movable or immovable. An immovable articulation is called a suture.
11 Division of the Skull Bones Cranium: Occipital bone Frontal bone Parietal bones Temporal bones Sphenoid bone Ethmoid bone (Palatine bones) Face: Vomer Lacrimal bones Nasal bones Inferior nasal conchae Zygomatic bones Maxillae Mandible
12 Division of Skull: Lateral View Facial Cranial
15 Cranial Bones: lateral view
13 Cranial Bones: Frontal and superior view 1 = Frontal bone 2 = Parietal bone
14 Cranial Bones: inferior view Temporal bone Sphenoid bone Occipital bone
16 Cranial Bones: Internal View Frontal bone Occipital bone Ethmoid bone Sphenoid bone Temporal bone Parietal bone
17 Parts of the Frontal Bone Glabella Supraorbital ridge Zygomatic Process ** Frontal sinuses
18 Parts of the Temporal Bone Squamous portion Mastoid process (Petrous portion) External auditory meatus
19 Temporal Bone Zygomatic Process Styloid Process Articular eminence Articular fossa (glenoid)
20 Sphenoid Bone: superior view
21 Sphenoid Bone: posterior view
21 Sphenoid Bone: lateral view from the midline
22 Sphenoid Bone: anterior view
24 Practice Identification Landmarks of the Sphenoid Bone Body of the sphenoid bone Greater wing of the sphenoid bone Lesser wing of the sphenoid bone Spine of the sphenoid bone Infratemporal crest
26 Practice Identification Landmarks of the Sphenoid Bone Pterygoid process Lateral pterygoid plate Medial pterygoid plate Pterygoid fossa Hamulus
Ethmoid Bone Ethmoidal sinuses Crista galli Superior and middle nasal conchae Superior portion of the nasal septum Cribriform plate (See page 60 of the text for the best illustration) Notable features:
27 Palatine Bone Lateral wall of nasal cavity Apex of orbit Posterior hard palate