UNIT 4 HEAD AND SKULL NOTECARDS
1.
-
Frontal Bone:The frontal bone is a
bone in the human skull that forms the forehead, the upper part of
the eye sockets (orbits), and the front part of the top of the
skull. It is a single bone that contributes to the formation of the
skullcap and the upper part of the eye sockets.
-
Parietal Bones:The parietal bones
are two large, flat bones that form the majority of the top and
sides of the human skull.
-
Sagittal Suture: The sagittal suture is situated
along the sagittal plane, which divides the skull into left and
right halves. It runs longitudinally from the anterior (front) to
the posterior (back) part of the skull.
2.
-
Glabella: smooth area above root of the nose,
between the eyebrows
-
Nasal Bones: Where glasses rest. Forms the superior
bony wall of the nasal cavity
3.
-
Coronal Suture: The coronal suture
is one of the major fibrous joints (sutures) in the human skull that
connects the frontal bone to the two parietal bones.
-
Temporal Bone: Side of skull (temple) The earhole
is the giveaway.
4.
-
Supraorbital foramen/notch: a hole through the brow
ridge, provides passage for nerve, artery and vein
5.
-
Maxilla: The maxilla is a paired bone that forms
the upper jaw and contributes to the structure of the facial
skeleton. It is one of the bones of the skull and plays a crucial
role in supporting the structures of the face and forming the upper
jaw and parts of the hard palate.
-
Alveolar Process: Portion of the
maxillary bones that form the support for teeth of the maxillary
arch
6.
-
Mandibular Fossa: depression or concavity in the
temporal bone of the skull. Look for piece of rubber on model.
-
Styloid Process: : pointy bone sticking
downward
-
Mastoid Process:large lump behind the ear
7.
-
External Acoustic Meatus: : the ear hole.
-
Zygomatic Bones: Cheek bones, defines the
face.
-
Zygomatic Process: The zygomatic
process is a bony projection that extends from the temporal bone and
contributes to the formation of the zygomatic arch, which is a part
of the cheekbone.
8.
-
Occipital bone: The occipital bone is a large,
unpaired bone located at the back of the skull. It forms the
posterior part and base of the skull, protecting the cerebellum and
brainstem.
-
Lambdoidal suture:The lambdoid suture is one of the
primary sutures in the human skull, joining the parietal bones to
the occipital bone. The lambdoid suture runs horizontally across the
posterior part of the skull, connecting the parietal bones to the
occipital bone.
9.
-
Ethmoid bone: Located between
eyes. Contributes to medial wall of orbit, walls and roof of nasal
cavity, and nasal septum.
-
Cribriform Plate: The cribriform plates are located
on each side of the ethmoid bone, forming part of the skull's
anterior cranial fossa.
-
Crista galli: situated in the
midline of the ethmoid bone, rising vertically from the cribriform
plate. It extends superiorly (upward) and separates the left and
right olfactory foramina.
-
Petrous part of Temporal bone: a pyramid-shaped
portion located at the base of the skull, deep within the skull
structure. located at the base of the skull, between the sphenoid
and occipital bones. It is situated on each side of the skull and is
well-protected by dense bone. You can pinch it.
10.
-
Occipital Condyle: paired, rounded
projections located on the inferior aspect of the occipital bone.
situated on either side of the foramen magnum, which is a large
opening at the base of the skull. The foramen magnum allows the
passage of the spinal cord.
-
Internal Acoustic Meatus: on temporal inner
ear
connected to external acoustic meatus, inside sound canal.
physically look inside to see it. -
Jugular Foramen: On temporal bone,
2 large holes nearest the magnum foramen. Wide as a pinky. Pipe
cleaner can go through it.
-
Carotid Canal: No wider than pipe cleaner, in front
of jugular foramen.
11.
-
Foramen Magnum: a large opening
located at the base of the skull, specifically in the occipital
bone. It is a crucial anatomical structure through which the spinal
cord passes, connecting the brain to the spinal canal.
-
Pterygold Processes: projects downward from the
junction of the body and greater wing of the sphenoid bone. bony
projections arising from the sphenoid bone, forming part of the
lateral walls of the skull and contributing to the base of the
skull.
13.
-
external occipital protuberance: a bony prominence
located on the external surface of the occipital bone at the back of
the skull. It serves as an anatomical landmark and an attachment
point for ligaments and muscles.
-
Squamous Suture: This is the flat
and scale-like portion of the temporal bone that forms the lateral
side of the skull. It contributes to the zygomatic process, which,
along with the zygomatic bone, forms the zygomatic arch
(cheekbone).
22.
-
Sella Turcica- bony saddle-shaped structure located
on the superior surface of the body of the sphenoid bone, which is a
butterfly-shaped bone at the base of the skull. Indentation in the
middle.
-
Palatine Process: The palatine
process refers to the horizontal, plate-like extensions of the
maxillary bones that contribute to the formation of the hard
palate—the bony structure at the roof of the mouth. Front 2/3 hole
of mouth-right before soft palate.
-
Palatine Bones: pair of L-shaped
facial bones that contribute to the formation of the hard palate,
part of the floor and lateral walls of the nasal cavity, and a small
portion of the eye sockets (orbits). Located at the back of the
nasal cavity, forming part of the facial skeleton.
23.
-
Superior orbital fissure: situated
at the junction of the greater and lesser wings of the sphenoid
bone. It is positioned in the posterior part of the orbit.
-
Optic Canal: Smaller hole, circular opening of the
eye socket. Pipe cleaner can fit through it.
24.
-
Greater and Lesser Wings: The greater and lesser
wings are two prominent bony structures of the sphenoid bone, a
butterfly-shaped bone located at the base of the skull.
-
Greater Wings:The greater wings are large,
flattened projections that extend laterally from the body of the
sphenoid bone.
-
Lesser Wings:The lesser wings are smaller bony
projections located superiorly and medially to the greater
wings.
27.
-
Maxilla: Forms side of nasal cavity, front
teeth.
-
Lacrimal Bones: Thin and roughly rectangular in
shape. paired, small, flat bones located within the facial skeleton,
contributing to the formation of the eye sockets (orbits) and the
medial walls of the orbits. Where tears drip out of your face.
"LACRIMAL" translates to "CRYING"
"TEARS"
28.
-
Vomer: behind nasal cavity, forming part of the
nasal septum. The vomer is typically thin and flat, resembling a
plowshare or a blade. Its shape helps to support and stabilize the
nasal septum.
-
Perpendicular Plate: located in
the midline of the ethmoid bone and extends downward from the
cribriform plate. a thin, vertical projection that descends from the
cribriform plate, forming the upper part of the nasal septum.
29.
-
Inferior Nasal Conchae: The inferior nasal conchae,
also known as the inferior turbinates, are thin, curved bones within
the nasal cavity. Situated on the lateral walls of the nasal cavity,
projecting inward like shelves.
-
Mandible: Commonly known as the jawbone, is the
largest and strongest bone in the human face.
-
The body of the mandible:forms the lower jaw and
contains the alveolar processes that support the lower teeth.
30.
-
Mental Foramen: The mental foramen is an opening or
hole located on the external surface of the mandible, which is the
lower jawbone. Holes on both side, near chin (on model)
-
Mental Eminence (protuberance): Bump near chin (on
model)
-
Alveolar Process: The alveolar
process refers to the bony ridge within the maxillary (upper jaw)
and mandibular (lower jaw) bones that contains the sockets, or
alveoli, for the teeth. The alveolar processes provide support and
housing for the roots of the teeth, securing them in position.
31.
-
Ramus: The mandibular ramus is a part of the
mandible (lower jawbone). The mandible has two rami (plural for
ramus), each extending upward from the body of the mandible. The
mandibular ramus has two main processes:
-
Coronoid Process: The coronoid process is situated
at the upper end of each mandibular ramus. The coronoid process is
situated at the upper end of each mandibular ramus.
-
Mandibular Condyle: a bony
prominence located at the posterior (back) end of each mandibular
ramus, which is part of the lower jawbone (mandible).
32.
-
Central and
Lateral Incisors: Central and
lateral incisors are types of teeth found in both the upper
(maxillary) and lower (mandibular) dental arches. The central
incisors are the most anterior (front) teeth in both the maxillary
and mandibular dental arches. In each dental arch, there are two
central incisors—one on the right side and one on the left.
-
Canines:The central incisors are the most anterior
(front) teeth in both the maxillary and mandibular dental arches.In
each dental arch, there are two central incisors—one on the right
side and one on the left.
33.
-
Premolars 1-2: situated between the canines and
molars in both the upper and lower dental arches.There are two
premolars in each quadrant of the mouth, making a total of eight
premolars in the permanent dentition.
- Molars 1-3: The
molars are the large, flat teeth located at the back of the mouth.
Third molar, commonly known as wisdom teeth.
36.
-
Crown: the visible, exposed part of the tooth above
the gumline. It is the portion of the tooth that is covered by
enamel, which is the hardest substance in the human body. Here are
key points about the crown of a tooth
-
Enamel: the outermost and hardest layer of a tooth,
covering the crown. can be worn away, irreplaceable, permanent, does
not grow back.
-
Dentin: Brown/Yellow. Dentin makes up the majority
of the tooth structure and is located between the enamel or cementum
and the pulp chamber. It forms the crown and root of the tooth.