LO 2
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Where does the line of separation between the cranial and facial bones run?
From the supraorbital ridge of the frontal bone to the mastoid process of the temporal bone
________ and ________ on the bony surface are landmarks for the attachments of associated muscles, tendons, and ligaments.
• Prominences • Depressions
________ are landmarks where various nerves and blood vessels enter or exit.
Openings in the bone
The longitudinal suture running from the frontal bone to the occipital bone is called the _________
Saggital suture
The suture that connects the occipital bone to the parietal bones is called the _______
Lamboidal suture
The suture that connects the frontal bone to the parietal bones is called the ________
Coronal suture
Define a process
• General term for any prominence on a bony surface • E.g. Alveolar process; Coronoid process
Define condoyle
• Specific type of prominence on bony surfaces - relatively large, convex prominences; usually involved in joints • E.g. occipital condyle; Mandibular condyle (aka condylar process)
Define head (relating to bony projections)
• Rounded surface projecting from a bone by a neck • E.g. Head of the condyle of the mandible – Includes the articulating surface of the condyle
Define tuberosity
• Bony protuberance or bulge, often rough • Typically attachment areas for muscles or tendons • E.g. Maxillary tuberosity - Often described as a bulge distal to the maxillary 3rd molar
Define arch
• Shaped like a bridge with a bow-like outline • E.g. Zygomatic arch (aka cheek bone) - formed by the union of processes from the temporal and zygomatic bones;
Define cornu
• Horn-like prominence • E.g. Greater cornu and lesser cornu of the hyoid bone
Define tubercle/eminence
• Rounded elevation/projection on a bony surface • E.g. genial tubercles (lingual foramen is in the middle of the genial tubercles) • E.g. frontal eminence (forehead)
Define crest
• A prominent, often roughened border or ridge • E.g. Infratemporal crest; Alveolar crest
Define line (relating to bony projections)
• Small, straight ridge • E.g. superior temporal line; inferior temporal line
Define spine (relating to bony projections)
• An abrupt prominence of bone that may be a blunt or sharply pointed projection • E.g. spine of the sphenoid bone; anterior nasal spine
Define notch
• An indentation at the edge of the bone • E.g. mandibular notch; coronoid notch
Define sulcus
• A shallow depression or groove that usually marks the course of an artery or nerve • E.g. infraorbital sulcus - the groove in the floor of the orbital surface
Define fossa
• Deeper depression on a bony surface • Fossae can be portions of joints, attachment areas for muscles, or have other functions • E.g. temporal fossa
Define bony plate
• Areas of the bones that are not prominences or depressions • Can also be demarcated • Flat, bony structures
Define foramen/foramina
• A short, window-like opening in the bone • E.g. Mental foramen; Mandibular foramen
Define canal (relating to bony openings)
• Longer, narrow tube-like opening in the bone • E.g. mandibular canal
Define meatus
• A type of canal • E.g. external acoustic meatus
Define a fissure (relating to bony openings)
• A narrow, cleft-like opening in a bone • E.g. superior orbital fissure; inferior orbital fissure