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What is the smallest muscle is in the middle ear?
What are the Unilateral motions of the Sternocleidomastoid
Unilateral motion is Laterally flexes ear to shoulder and rotation of the head
What is the Bilateral motion of the Sternocleidomastoid?
Flexes the Neck
Sternocleidomastoid origin and insertion
Origin: Sternal head, Clavicular head
Insertion: Mastoid Process
What are the 3 muscles in the Scalenes group?
1. Anterior Scalene
2. Middle Scalene
3. Posterior Scalene
What is the action of the Scalenes Unilaterally?
Flex and Rotate the head.
What is the Bilateral action of the Scalenes?
Elivate the ribs during inhalation
What is the strongest muscle of the body?
What is the Origin and Insertion of the Masseter?
Origin: Zygomatic Arch
Insertion: Angle and Ramus of the Mandible
What are the 3 bones that the Temporalis attaches to?
1. Temporal Fossa
2. Coronoid Process
3. Anterior edge of Ramus
What are the 3 muscles associated with the Trigeminal Nerve?
What are the 3 muscles of the Suprahyoid group?
What is the action of the Suprahyoid group?
Elivate the Hyoid and tongue
Origin and Insertion of the Suprahyoid group
Origin: Underside of mandible, styloid process
Insertion: Hyoid bone
The Diagastric muscle
Action: depress the madible, elevate the hyoid bone, retract the mandible
Origin: Mastoid process
Insertion: Inferior boarder of the mandible
Sternohyoid and the Sternothyroid
from the thyroid down
Description of the Platysma
Thin superficial sheath spanning the anterior neck. Assists to depress the manible.
What is the action of the occipitofrontalis?
Raise eyebrows and wrinkle forehead (frontalis)
Anchor and retract the galea posteriorly (occipitalis)
What is the origin and insertion of the Occipitofrontalis
Origin: Galea aponeurocia (frontalis)
Insertion: Frontalis skin superior to eyebrow(frontalis)
Origin: Superior nuchal lineof he occiput(occipitals)
The Medial and Lateral Pterygoids assist which muscle?
What is the unilateral action of the Medial Pterygoid
Laterally deviates the mandible to the opposite side
What is the Unilateral Action of the Lateral Pterygoid?
Laterally deviates the mandible to the opposite side.
What is the Bilateral action of the Medial Pterygoid
1. Elivate the mandible
2. Protract the mandible
What is the Bilateral action of the Lateral Pterygoid?
Protract the Mandible
What are the actions of the Longus Capitis
Unilaterally: Laterally Flex the head and neck to the same side. Rotate the head and neck to the same side.
Bilaterally: Flex the head and neck.
What are the actions of the Longus Colli
Unilateral: Laterally Flex the head and neck to the same side. Rotate the head and neck to the same side.
Bilaterally: Flex the head and neck
When would you use the buccinator muscle
blow a trumpet
suck on a straw
Describe the facial expression when using your Depressor Anguli Oris
Inverted clown smile
Describe the facial expression when Depressor Labii Inferioris is being used.
bares the lower teeth good for brushing teeth and flossing.
can also show determination or mock anger.
Describe the facial expression when using Levator Anguli Oris
assists in smiling
you can elivate the corner of the mouth
Describe the facial expression Levator Labii Superioris
Elivate and protrude the upper lip as when searching for food stuck in your teeth.
can also produce an elvis like sneer.
Describe the facial expressions when using the Mentalis
protrude the lower lip and elivate the skin of the chin to cause a pout.
used when crying or with sadness
How many bones does the skull have?
How many cranial?
How many facial?
total of 22 bones
name 2 boney landmarks associated with the Occiput.
External Occipital Protuberance (bump of knowledge)
Super Nuchal Lines
What is a Fontanel?
A fontanel is an unossified gap in the skull.
Name the temporal bones
How many bones does the Sphenoid bone attach too?
What does the Sphenoid bone look like?
It has 14 bone attachments
looks like a butterfly
What are the layers of the Trachea?
Frontal bone includes
top of eye socket