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Head and Neck
Head and Neck
18
Anatomy
Undergraduate 3
09/27/2012

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Cards

Term
How many bones does the cranium consist of?
Definition
Eight (one frontal, two parietal, two temporal, one occipital, one sphenoid, and one ethmoid)
Term
What does the skull consist of?
Definition
2 parts:
Neurocranium
Facial skeleton
Term
What does the facial skeleton consist of?
Definition
14 bones: Maxilla X2, Nasal X2, Zygomatic X2, Lacrimal X2, Palatine X2, Inferior Nasal Conchae X2, Mandible X1, Vomer X1
Term
What are fontanelles?
Definition
the unossified remnants of the membranes in newborns in the skull
Term
What are the major fontanelles?
Definition
Major fontanels are: anterior (ossified within 18-36 months), posterior,
mastoid and sphenoid which are ossified within 6 month or more
Term
What are the four mentioned groups of mimetic muscles?
Definition
4 groups:
A- Muscles of the Scalp
B- Muscles in the region of eyelid
C- Muscles in the Nasal region
D- Muscle of the Mouth region
Term
Epicranius Muscle consists of what?
Definition
Has 2 bellies: Frontal, Occipital, and in between, the Galea Aponeurotica.
Term
Epicranius function
Definition
produces wrinkles in forehead and gives facial
expression of Astonishment.
Term
Epicranius Innervation
Definition
All mimetic muscles by Facial
nerve (cranial nerve CNVII).
Term
Orbicularis Oculi muscle consists of what and functions how?
Definition
Has 3 parts: Orbital , Palpebral and
Lacrimal .
Function: produces folds in lateral angle of the
eye, expression of Worry and concern.
Term
Corrugator supercilli function and innervation
Definition
Pulls the skin and eyebrow down and medially.
Produces vertical folds. Protects against light.
Pathetic pain muscle.
Thinker’s brow expression
Innervation: All mimetic muscles by Facial (CNVII) N.
Term
Orbicularis Oris M. function?
Definition
Function: its contraction closes the mouth. Strong contraction gives a sucking shape. Expression of reserve
Term
Buccinator Muscle characteristics?
Definition
Quadrilateral in shape.
Origin: mandible at 1st or 2nd molar region. Forms the pterygomandibular raphe. Extends to angle of the mouth and forms the lateral wall of its vestibule.
Term
Buccinator Function
Definition
Function: enables air to be blown out of the mouth. Pulls angle of the mouth laterally. Keeps the mucous membrane of the cheek free of folds. Contraction gives expression of satisfaction
Term
Zygomaticus Major origin, insertion, and function?
Definition
Origin: zygomatic bone.
Insertion: angle of mouth.
Function: lifts the corner of the mouth upward,
giving expression of laughter or pleasure.
Term
Zygomaticus Minor origin and insertion?
Definition
Origin: zygomatic bone
Insertion: nasolabial groove
Term
Risorius function?
Definition
(laughing muscle)
Function: together woth zygomatic major it
produces the nasolabial folds.
Its contraction gives expression of Action
Term
Levator labii superioris origin?
Definition
Origin: Infraorbital margin to skin of upper lip
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