Muscle->function Flashcards
Occipitlis
Function?
Facial muscle that draws the scalp backward
Frontalis
Function?
Located above eye.
Elevates eyebrows, wrinkles skin of forehead
Zygomtic minor
Function?
Draws upper lip upward and outward
What does the Zygomatic major due?
Pulls angle of mouth upward and backward when laughing
Orbicularis Oris function?
Closes lips.
What are the four main muscles of mastication?
Masseter-> closes jaw
Temporalis-> raises mandible and closes mouth, draws mandible backward
Medial Pterygoid-> Raises mandible; closes mouth
Lateral Pterygoid-> brings jaw forward
Name the 6 main muscles that control eye movement
Superior Rectus Inferior Rectus Medial Rectus Lateral Rectus Superior Oblique Inferior Oblique
What does the Sternocleidomastoid do
Flexes vertebral column
Rotates head
What does the Trapezius do?
Draws the head to one side.
It also rotates the scapula
What does the deltoid do and where is it located?
Origin: Clavicle, Scapula
Insertion: Humerus
Function: Arm abducts
What does Pollicis associated with?
Muscles that move the thumb
What does digit/digitorum associated with?
Muscles that move the fingers
What are the two terms used when describing muscles?
They either have the term oblique (external or internal) or abdmoninis (transverse or rectus)
Describe how the diaphragm allows you to breath
Main muscle: Diaphragm
When it contracts it causes air to enter the lungs.
When the diaphragm relaxes air is expelled from the lungs.
To assist the external intercostal elevate the ribs creating a negative pressure in the lungs to bring air in. When the diaphragm relaxes the internal intercostal depresses the ribs creating positive pressure helping to expel air out.
What are the three muscles that make up hamstrings?
1) Biceps Femoris
2) Semitendinosus
3) Semimembranosus
All three flex the leg
