Chapter 9: Head and Neck Anatomy Flashcards
11 regions of the head
- Frontal
2.Parietal
3.Occipital
4.Temporal
5.Orbital
6.Nasal
7.Infraorbital
8.Zygomatic
9.Buccal
10.Oral
11.Mental
Two sections of the bones are called
- Cranium
2.Face
How many bones does the cranium have. What is its function?
8
Covers and protects the brain
How many bones does the face have?
14
How many total bones are in the skull?
22
How many bones does the FRONTAL BONE have and where is it found?
1 Bone
forms the forehead, most of the orbital roof and the anterior cranial form
How many bones does the PARIETAL BONE have and where is it found?
2 bones.
Forms the roof and upper sides of the cranium
How many bones does the OCCIPITAL BONE have and where is it found?
1 BONE
Back and base of the cranium
How many bones does the TEMPORAL BONE have and where is it found?
2 BONES
Side and base of cranium
How many bones does the ZYGOMATIC BONE have and where is it found?
2 BONES
CHEEKS and part of the orbit
How many bones does the MAXILLARY BONE have and where is it found?
2 BONES
Upper JAW
How many bones does the PALATINE BONE have and where is it found?
2 BONES
Posterior part of the hard palate.
Which TWO bones form the maxilla (upper jaw)
Palatine bone and maxillary bone
How many bones does the NASAL BONE have and where is it found?
2 BONES
Bridge of the nose
How many bones does the MANDIBLE BONE have and where is it found?
1 BONE
forms lower JAW
What is the Foramen
A natural opening in a bone where blood vessels, nerves and ligaments pass
What is the fossa
A hollow grooved, or depressed area in the bone
What is a PROCESS
projection on the bone
What is a tubercle
a SMALL round projection on a bone
What is tuberosity
a LARGE rounded process on a bone
Which two bones form the prominence of the cheeks?
Zygomatic bones (malar bones)
Which TWO BONES form the upper jaw?
maxillary bones
Which moveable bone forms the lower jaw
Mandible
What is the MENTAL PROTUBERANCE
chin
What is the HYOID BONE
It is the main support for the tongue.
DOES NOT join with any other bone
Differences between male and female skulls
female skulls are smaller and lighter
female skulls are rounder
females have rounder smaller teeth
male teeth are LARGER and SQUARED
What does TMJ stand for?
Temporomandibular Joint
Which two bones join together to make TMJ?
Temporal bone
Mandible Bone
Through which twoprocess does the TMJ form?
through the glenoid fossa and condyloid process
What muscles is the mandible held by?
The muscles of mastication
What are the three parts that make TMJ
Glenoid Fossa
Articular eminence
Condyloid Process
The movement of the jaw is possible because of which joint and muscle?
Jaw joint and Muscle of mastication
Jaw open
Hinge action
Jaw wide open
Glide AND hinge action
First phase in mouth opening
Hinge OPEN
Second phase in mouth opening
Gliding movement
What is TMD
Temporomandibular disorder
What is Bruxism
Grinding of teeth
Symptoms of TMD
Pain
Joint sounds
limitations in movement
What is crepitus
cracking sounds coming from the joint
What is trismus
SPASM of the muscles of mastication
Causes of TMD
Stress
bruxism
accidents
disease
malocclusion
what are the muscles of facial expressions? (B.O.M.Z)
Buccinator
Orbicularis Oris
Mentalis
Zygomatic Major
Function of buccinator muscle
compresses cheeks against the teeth
Function of Orbicularis oris
Closes and puckers lips
Function of Mentalis
pushes upper lip
Function of zygomatic major
Muscles that help with laughing
What are the major muscles of mastication? (M.I.T.E)
Masseter
Internal(medial) Pterygoid
Temporal
External (Latera) Pterygoid
(M.I.T) ALL CLOSES JAW
(E) Opens jaw
What are the three MAJOR SALIVARY GLANDS (P.S.S)
Parotid
Submandibularglands
Sublingual glands
Largest of all salivary glands located in area below front of the ears
Parotid
What is the duct called in the Parotid
STENSENS DUCT
Which salivary gland produces the MOST saliva at 60-65%
Submandibular salivary gland
Which salivary gland lies beneath the mandible?
Submandibular salivary gland
What is the duct called in the submandibular salivary gland?
Wharton’s Duct
Which is the smallest salivary gland and what percentage of saliva does it produce?
Sublingual Salivary Gland. Produces 10%
What is the duct called in the Sublingual salivary duct?
Bartholin’s Duct
What may block the salivary glands in the duct opening?
Sialolith (stones)
What is Carotid
main artery that supplies blood to the face area and brain.
How many nerves are there in the cranial nerves
12
What is innervation?
nerves being attached to
What is the trigeminal nerve
Primary source of nerves being attached to (innervation) the oral cavity (mouth)
How many divisions does the trigeminal nerve divide into?
THREE
What are the three main divisions of the TRIGEMINAL NERVE
Ophthalmic
Maxillary
Mandibular
The SUPERIOR ALVEOLAR NERVE supplies the __
Maxillary
The INFERIOR ALVEOLAR NERVE supplies the ____
Mandible
What is the Minor salivary gland called?
Von Ebner’s salivary gland
located on top of tounge