Introduction to the Skull, Face and Scalp Flashcards
Group of skull bones that protect the brain.
Neurocranium
Group of skull bones that protect the airway.
Viscerocranium
Suture between the frontal and parietal bones
Coronal
Suture between the two parietal bones
Sagittal
Suture between the parietal and temporal bones
Squamosal
Suture between the parietal, temporal and occipital bones
Lambdoidal
Intersection between the squamosal and coronal sutures
Pterion
Intersection between the coronal and sagittal sutures
Bregma
Intersection between the lambdoid and sagittal sutures
Lambda
Boundaries of the orbit
Roof = Frontal bone Lateral wall = Zygomatic bone Floor and part of medial wall = Maxilla Rest of medial wall = Lacrimal, Ethmoid, Palatal Posterior wall = Sphenoid
Where is the supraorbital notch located?
In superciliary arch
Where is the optic foramen located in the orbit?
In medial wall
Where is the super orbital fissure located in the orbit?
In medial wall
Where is the Inferior orbital fissure located in the orbit?
In floor
The lacrimal groove communicates with this
Nasal cavity
Boundaries of the nasal cavity
Roof = Nasal bones, frontal sinus, ethmoid, sphenoid sinus
Floor and wall = Maxillary bones
Floor = Palatine horizontal plate
Medial wall = Vomer and perpendicular plate of ethmoid
Medial wall = Nasal septum
Projections from the lateral wall of the nasal cavity
Nasal conchae
The superior and middle nasal conchae are projections of this bone
Ethmoid
This conchae is its own separate bone
Inferior nasal conchae
What are the features of the paranasal sinuses
Spaces within skull bones Make bones lighter Add resonance to voice Lined by mucousal membranes Continuous with nasal cavity
What foramen does the olfactory nerve (CN I) transmit through?
Cribiform plate
What passes through the optic canal?
Optic nerve (CN II), opthalmic artery
What passes through the superior orbital fissure?
CN III, CN IV, CN VI, CN V1
What foramen does the maxillary nerve pass through?
Foramen rotundum
What foramen does the mandibular nerve pass through?
Foramen Ovale
What passes through the foramen spinosum?
Middle meningeal artery
What passes through the jugular foramen?
IJV, CN IX, CN X, CN XI
What foramen does CN VII and VIII pass through?
Internal Acoustic foramen
What passes through the stylomastoid foramen?
CN VII
What passes through the foramen magnum?
Vertebral arteries and spinal cord
This is considered the danger space of the scalp
Loose areolar tissue
What is the action of the occipitofrontalis muscle?
Moves scalp back and forward
What is the action of the three auricularis muscles?
Protract, elevate and retract ears
What is the actions of the muscles of facial expression?
Attach to bone or fascia and act by pulling the skin
Surround the orifices of the face acting like sphincters and dilators