Skull
Fx of the floor of the orbit
Blowout fx
All of the following structures are located on the sphenoid bone except
Foramen magnum
In the adult skull, the immovable articulation between the parietal and temporal bones is called the:
Squamosal suture
At what age is the skull adult size and density is achieved?
12 years
The adult cranial vault or calvaria that houses the brain is formed by all or part of _______ cranial bones
8
What does the ethmoid bone consist of?
A horizontal plate, a vertical plate, and two labyrinths
The surface landmark associated with the anterior nasal spine at the junction of the upper lip and nose is called the:
Acanthion
Benign tumor arising from Schwann cells of the eighth cranial nerve
Acoustic Neuroma
Extending anteriorly from the dorsum sella are two bony processes that help in the formation of the lesser wing of the sphenoid. These are termed the:
Anterior clinoid processes
What are the 3 groups of air cells?
Anterior, middle, and posterior ethmoidal air cells
What are the 4 fontanels?
Anterior, posterior , mastoid and sphenodial fontanels
What is at the junction of the occipital bone, parietal bone, and mastoid portion of the temporal bone?
Asterion
Fracture located at the base of the skull
Basal fx
What is the junction of the coronal and sagittal sutures?
Bregma
Fx to one side of a structure causes by trauma to the other side
Contre-coup fx
What are the 4 sutures?
Coronal, sagittal, squamosal, and lambdoidal sutures
The flattened, horizontal portion on the superior aspect of the ethmoid bone is called the:
Cribiform plate
The horizontal portion of the ethmoid bone
Cribriform plate
A thick, conical process that projects superiorly from its anterior midline and serves as the anterior attachment for the falx cerebri
Crista galli
The meninges, the membranes that help protect the brain, have an attachment on a small triangular process of the ethmoid bone called the:
Crista galli
Fx causing a portion of the skull to be depressed into the cranial cavity
Depressed fx
The bones of the cranial vault are composed of two plates of compact tissue separated by an inner layer of spongey tissue called what?
Diploe
The superior and middle nasal conchae that serve to increase the surface area of the nasal cavities are found on the:
Ethmoid bone
Which bone does not form any portion of the lateral cranial wall?
Ethmoid bone
The large prominent ridges of on the anterior surface of the frontal bone (superciliary ridges) are closely related to the surface structure termed the:
Eyebrows
The large foramen that passes through the occipital bone, which allows for the passage of the spinal cord and brain stem into the calvaria, is called:
Foramen magnum
The coronal suture is located between the:
Frontal and parietal bones
What does the ethmoid bone articulate with?
Frontal and sphenoid bones
On each side of the midsagittal plane of the superior portion of the squama is the rounded elevation called:
Frontal eminence
What is the vertical portion of the frontal bone?
Frontal squama
Each parietal bone articulates with what?
Frontal, temporal, occipital sphenoid, and opposite parietal bones
The localizing point that is found between the eyebrows over the frontal bone is called the:
Glabella
The smooth elevation between the superciliary arches
Glabella
The external occipital protuberance is often referred to as the:
Inion
In the adult, the junction between the sagittal and lambdoidal sutures is known as the:
Lambda
What is the junction of the lambdoidal and sagittal sutures?
Lambda
Between the occipital bone and parietal bones is what?
Lambdoidal suture
In the adult skull, the immovable articulation between the parietal and occipital bones is called:
Lambdoidal suture
What are labyrinths?
Light, spongy lateral masses
The sagittal suture is found where?
Located on the top of the head between two parietal bones and just behind the coronal suture line
Which bone does not form any portion of the nasal cavity or septum
Malar bone
The roof of the mouth (hard palate) is formed by the inferior surfaces of what bones?
Maxillary bone and palatine bones
Malignant neoplasm of plasma cells involving the bone marrow and causing destruction of the bone
Multiple Myeloma
The lacrimal canal is a bony groove through the lacrimal bone that serves to connect the:
Nasal and orbital cavities
The junction of the nasal bones and the frontal bones correspond to a useful surface landmark called the:
Nasion
The midpoint of the frontonasal suture
Nasion
The condyles of articulation with the first cervical vertebra are located on the inferior surface of the:
Occipital bone
Tumor composed of bony tissue
Osteoma
Inflammation of bone due to a pyogenic infection
Osteomyelitis
Increased density of atypically soft bone
Osteopetrosis
Loss of bone density
Osteoporosis
The lateral border of the eyelids meet at a point termed the:
Outer canthus
Thick, soft bone marked by bowing and fractures
Paget's Disease
The nasal cavities have a continuous membrane with a series of cavities within the cranial bones called the:
Paranasal sinuses
The coronal suture is found between what two bones?
Parietal and frontal bones
The floor of the cranial vault is formed by all or part of the following except
Parietal bones
The majority of the sides and top of the cranial vault are formed by a pair of bones called the:
Parietal bones
The widest transverse measurement of the skull is found between the two:
Parietal bones
Each parietal bone presents a prominent bulge near the central portion of its external surface
Parietal eminence
What does the ethmoid bone form?
Part of the anterior cranial fossa, the nasal cavity, and orbital walls, and the bony nasal septum
The vertical portion of the ethmoid bone that projects inferiorly from the inferior surface of the cribriform plate and, with the nasal spine, forms the superior portion of the bony septum of the nose
Perpendicular plate
The majority of the upper portion of the nasal septum is formed by the:
Perpendicular plate of the ethmoid bone
The hard, dense bony process of the temporal bones that houses the structures of the middle and inner ear is called the:
Petrous pyramid
The small, U-shaped hyoid bone is situated below the floor of the mouth, aids in the act of:
Phonation and swallowing
Tumor arising from the pituitary gland, usually in the anterior lobe
Pituitary Adenoma
Growth or mass protruding from a mucous membrane
Polyp
On the lateral aspect of the skull, the junction of the parietal bone, squamosal suture, and greater wing of the sphenoid is the what?
Pterion
What does the frontal bone articulate with?
Right and left parietals, the sphenoid, and the ethmoid bones of the cranium
Inflammation of one or more of the paranasal sinuses
Sinusitis
The greatest number of cranial foramina are located on the:
Sphenoid bone
The majority of the middle cranial fossa are formed by the body of the:
Sphenoid bone
The pterygoid processes that form part of the posterior nasal cavity are the inferior extensions of the:
Sphenoid bone
Between the temporal bones and parietal bones is what?
Squamosal suture
The long, sliver-like processes that extend inferiorly from each temporal bone, serving for the attachment of the muscles of speech, are called:
Styloid processes
The two arched ridges that correspond in position to the eyebrows
Superciliary arches
Fibrous joints
Sutures
Dysfunction of the temporomandibular joint
TMJ Syndrome
The bony orbit is formed by all of the following bones except:
Temporal bone
The mastoid air cells are located posterior to the ear within a large, bony prominence of the:
Temporal bone
What do the labyrinths contain what?
The ethmoidal sinuses, or air cells
Fx of the zygomatic arch and orbital floor or rim and dislocation of the frontozygomatic suture
Tripod fx
The sphenoid bone consists of what?
Two lesser wings, two greater wings, two pterygoid processes
The sagittal suture is located between the:
Two parietal bones
The zygomatic arch is formed by portions of the:
Zygomatic and temporal bones
