Muscles Pt 1

Question 1

Masseater

Answer 1

Origin: Zygomatic Arch
Insertion:Mandibular ramus
Action: Close Jaw

Question 2

Sternocleidomastoid

Answer 2

Origin: Clavicle, scapula
Insertion: Temporal bone
Action: Flex Neck

Question 3

Frontalis

Answer 3

Origin: Epicranial Aponerosis
Insertion: Skin around eyebrows
Action: Raise eyebrows

Question 4

Occipitalis

Answer 4

Origin: Occipital bone
Insertion: Epicarnial aponeurosis
Action: Retracts the scalp

Question 5

Zygomaticus

Answer 5

Origin: Zygomatic bone
Insertion: skin around corner of the mouth
Action: smile

Question 6

Temporalis

Answer 6

Origin: Temporal fossa
Insertion: mandible
Action: Closes Jaw

Question 7

Trapezius

Answer 7

Origin: occipital bone
insertion: scapula
Action: retract, elevate, stabilize scapula

Question 8

Rhomboid

Answer 8

Origin: spinous process
Insertion: Scapula
Action: Retract and Stablize scapula

Question 9

Levator Scapulae

Answer 9

Origin: Transeverse process
Insertion: Scapula
Action: elevate and retract scapula

Question 10

Iliocostalis, Longissimus, and Spinalis

Answer 10

Action: Extend and Laterally flex vertebral column (spin)

Question 11

Supraspinatus

Answer 11

Origin: Supraspinatus fossa
of scapula
Insertion: Greater tubercle of humerus
Action: Abduction of humerus

Question 12

Infraspinatus

Answer 12

Origin: Infraspinatus fossa of scapula
Insertion: Greater tubercle of humerus
Action: External rotation of humerus

Question 13

Teres Minor

Answer 13

Origin: Lateral border of scapula
Insertion: Greater tubercle of humerus
Action: External rotation and adduction of humerus

Question 14

Subscapularis

Answer 14

Origin: Subscapular fossa of scapula
Insertion: Lesser tubercle of humerus
Action: Internal rotation and adduction of humerus