Axial Skeleton Flashcards
Opening above each orbit allowing blood vessels and nerves to pass
Supraorbital foramen
Smooth area between the eyes
Glabella
Occurs where the left and the right parietal bones meet superiorly in the midline of the cranium
Sagittal suture
Running in the frontal plane, occurs anteriorly where the parietal bones meet the frontal bones
Coronal Suture
Occurs where each parietal bone meets the temporal bone, on each lateral aspect of the skull.
squamous suture
Articulation process for zygomatic bone
Zygomatic process
Located on the inferior surface of the zygomatic process; receives the condylar process of the mandible to form the temperomandibular joint
Mandibular fossa
Canal leading to the middle ear and eardrum
external auditory meatus
Needlelike projection that serves as an attachment point for ligaments and muscles of the neck.
Styloid Process
Located posterior to the external acoustic meatus; serves as an attachment point for neck muscles
Mastoid Process
Tiny opening between the mastoid and styloid processes through which cranial nerve VII leaves the cranium
Stylomastoid Foramen
Located where the petrous part of the temporal bone joins the occipital bone. Forms an opening which the internal jugular vein and cranial nerves (IX, X, and XI) pass.
Jugular foramen
Opening through which the internal carotid artery passes into the cranial cavity
Carotid canal
Occurs where the parietal bones meet the occipital bone posteriorly
Lamboid suture
Large opening in the base of the bone, which allows the spinal cord to join with the brain stem
Foramen Magnum
Rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra
Occipital condyles
Rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra (atlas)
Occipital condyles
Midline prominence posterior to the foramen magnum
External occipital crest and protuberance
Project laterally from the sphenoid body, forming parts of the middle cranial fossa and the orbits
Greater wings
Slits in the orbits providing passage of the cranial nerves that control eye movements (III, IV, VI, and the opthalmic division of V)
Superior Orbital Fissures
Slits in the orbits providing passage of the cranial nerves that control eye movements (III, IV, VI, and the opthalmic division of V)
Superior Orbital Fissures
“Turkish saddle” located on the superior surface of the body; the seat of the saddle , called the hypophyseal fossa, holds the pituitary gland.
Sella turcica
Form part of the floor of the anterior cranial fossa and part of the orbit
Lesser wings
Openings in the base of the lesser wings; cranial nerve II (optic nerve) passes through to serve the eye
Optic canals
Openings located in the medial part of the greater wing; a branch of cranial nerve V (maxillary division) passes through
Foramen Rotundum
Openings located posterolateral to the foramen rotundum; a branch of cranial nerve V (mandibular division) passes through-Trigeminal Nerve
Foramen ovale
Openings located posterolateral to the foramen spinosum; provides a passageway for the middle meningeal artery (associated with strokes)
Foramen Spinosum
Almost completely closed by cartilage in the living person but forms a jagged opening in dried skulls; where sphenoid and temporal bones meet
Foramen Lacerum
“Roosters comb”; a superior projection that attaches to the dura mater, helping to secure the brain within the skull
Crista galli
Located lateral to the crista galli; form a portion of the roof of the nasal cavity and the floor of the anterior cranial fossa; contains olfactory foramen where olfactory nerves pass through
Cribriform plates
Inferior projection that forms the superior portion of the nasal septum
Perpendicular plate
Extend medially from the lateral masses; act as turbinates to improve air flow through the nasal cavity
Superior and middle nasal conchae
Horizontal portion that forms the chin
body
Vertical extension of the body
Ramus
Posterior projection articulates with mandibular fossa
Mandibular condyle
“Crown shaped” portion of the ramus for muscle attachment
Coronoid process
Posterior points where the ramus meets the body
angle
Two holes in anterior portion of mandible where blood vessels and nerves pass through
Mental foramina
medial side of the mandible where mandibular nerve passes through
Mandibular foramen
Superior margin of the mandible; contains sockets where the teeth lie
Alveolar margin
Forms the anterior hard palate; meet anteriorly in the intermaxillary suture
Palatine process
Hole just below the orbit where nerves and blood vessels pass through
infraorbital foramen
Encloses and protects the brain
cranium
Makes up the forehead
frontal bone
Where the eyebrows sit, upper portion of the orbit
Supraorbital margins
upper portion of the orbit, where nerves and blood vessels pass through
Supraorbital foramen
Makes up the superior/lateral portion of the skull
Parietal bone
Makes up the posterior part of the skull
Occipital bone
Bump where muscle connects on back of the head
External occipital protuberance
Inferior/lateral portion of the skull
Temporal bones
Helps to form the zygomatic arch
Zygomatic process
Formed by the temporal and zygomatic bone
Zygomatic arch
Articulates with the mandibular condyle
Mandibular fossa
External ear canal
External Auditory Meatus
Found between the styloid and mastoid
Stylomastoid foramen
Where the jugular vein passes through
Jugular foramen
Where the carotid artery passes through; supplies the brain with 80% of its blood supply
Carotid canal
Where vestibulochlear nerve passes through
Internal Acoustic Meatus
Deepest cranial bone
Ethmoid bone
Where olfactory nerves pass through
Olfactory foramina
Makes up the lower jaw, only moveable bone in the skull
Mandible
Between mandibular condyle and coronoid process
Mandibular notch
Joint between mandibular fossa and condyle
Temporomandibular joint (TMJ)
Form the upper jaw
Maxillary bones
Cheek bones
Zygomatic bones
Make up the bridge of the nose
Nasal bones
Where tear sac sits
Lacrimal fossa
Posterior part of the hard palate
Palatine bone
Inferior portion of the nasal septum
Vomer
Seven bones that form the orbit
Frontal Lacrimal Maxilla Zygomatic Sphenoid Ethmoid Palatine bone
Lined with mucus, warm and moisten incoming air and lightens the weight of the head
Paranasal Sinuses
Name four paranasal sinuses
Frontal, sphenoid, ethmoid, and maxillary sinuses
Only bone in the body that doesnt touch another bone; anchors the tongue
Hyoid bone
Transfers weight from the trunk to the legs; surrounds and protects the spinal cord
The vertebral column
Posterior curve in the spine, found in thoracic and sacral areas
Kyphotic curve
Born with this type of curve in spine
Primary curve
Anterior curve in the spine in the cervical and lumbar area
Lordotic curve
Curve in spine that is developed later; not born with it
Secondary curve
Abnormal lateral curve of vertebral column
Scoliosis
Disc between the vertebrae for cushioning
Intervertebral discs