Flashcards in Exam 4 Regional Anatomy; Head & Neck Deck (153)
The Skull is composed of how many bones?
The skull consists of what two sections?
Cranial Bones (Neurocranium, Cranium, Cranial Vault)
Facial Bones (Facial Skeleton)
What is the only Moveable bone of the skull other than the ear ossicles?
The Neurocranium (Crainal Vault) Provides what?
Case for the brain, Cranial meninges, cranial nerves, & associated structures
The Facial Skeleton may also be called?
Viscerocranium or Splanchnocranium
What bones form the Neurocranium in an adult?
-Frontal Bone -1
-Parietal Bones -2
-Temporal Bones -2
-Occipital Bone -1
-Sphenoid Bone -1
-Ethmoid Bone -1
How are most bones of the Neurocranium united?
Fibrous Interlocking Sutures
What is the space in the skull within the neurocranium occupied by the brain & broadly speaking bounded by the Calvaria & Basicranium?
What is the Calvaria (Skullcap)?
Domelike roof of the cranium
What makes up the Calvaria?
-Superior portions of Frontal Bone
What is the Basicranium?
(Cranial Base) Floor of the cranium
What makes up the Basicranium?
-Temporal (Petrous portion)
-Portion of Maxillae
What are the functions of the Cranial Bones?
-House Ear Ossicles
-Muscle Attachment for Jaw, Neck, & facial Muscles
What are the functions of the Facial Bones?
-Protect Delicate Sense Organs
-Support entrances to Digestive & Respiratory System
Which bone forms the roof of the orbits, supraorbital margin, frontal sinus, & anterior cranial floor?
By what age is the Frontal suture gone?
What is it called if the frontal suture does not close?
What bone forms the sides & roof of the cranial cavity?
What bone is the zygomatic process, external auditory meatus, mastoid process, styloid process, and Temporal squama on?
The mandibular fossa, & petrous portion are found on which bone?
The Mandibular fossa & Mandible articulate to form what joint?
What nerve passes through the Stylomastoid Foramen?
Facial Nerve (CN-VII)
What is significant about the petrous portion of the Temporal Bone?
Houses the components of the inner ear & conveys the Vestibulocochlear Nerve (CN-VIII)
What Foramen are found on the Temporal Bone?
Stylomastoid Foramen (CN-VII)
Carotid Foramen (Carotid Artery)
Jugular Foramen (Jugular Vein)
What is the attachment site for the Ligamentum Nuchae?
External Occipital Protuberance on the Occipital Bone
On which bone are the Superior & Inferior Nuchal Lines located?
What are some key structural aspects of the Occipital Bone & what is the significance?
-Foramen Magnum: Spinal Cord pass through to spinal Column
-Occipital Condyles: Form joint with 1st Cervical Vertebra
Which bone is considered the Keystone bone because it articulates with all other cranial bones?
Sphenoid Bone (Located in the middle part of the base of the skull)
What is the name of the attachment site for some of the muscles that move the mandible & are found on the Sphenoid Bone?