Anatomy II: Muscles/Origin/Insertion/Action

Question 1

What is Origin?

Answer 1

Attachment to the bone, does not move bone

Question 2

What is Insertion?

Answer 2

Attachment to the bone, moves the bone

Question 3

What is Action?

Answer 3

What it is doing

Question 4

What is Adduct?

Answer 4

Toward the midline

Question 5

What is Abduct?

Answer 5

Away from the midline

Question 6

What is Elevate?

Answer 6

Raising

Question 7

What is Depress?

Answer 7

Lowering

Question 8

What is Extend?

Answer 8

Increasing the angle

Question 9

What is Flex?

Answer 9

Decreasing angle

Question 10

What is Rotation?

Answer 10

Medial (toward midline) or lateral (away from midline)

Question 11

Trapezius: Origin, insertion, action

Answer 11

Origin: Occipital bone, cervical, and thoracic vertebrae
Insertion: Scapula, clavicle
Action: Adduct, elevates and raises scapula, raises clavicle,

Question 12

Deltoid: Origin, Insertion, action

Answer 12

Origin: clavicle, scapula
Insertion: Humerus
Action: Abduct arm

Question 13

Levator Scapulae: origin, insertion, action

Answer 13

Origin: Clavicle vertebrae
Insertion: Scapula
Action: Raises scapula

Question 14

Latissimus Dorsi: Origin, Insertion, action

Answer 14

Origin: Sacrum, ilium, lumbar, thoracic vertebrae, ribs
Insertion: Humerus
Action: Elevates, adducts, rotates arm medially; pulls downward; stabilizes scapula

Question 15

Rhomboideus Major: Origin, insertion, action

Answer 15

Origin: Thoracic vertebrae
Insertion: Scapula
Action: Elevates, adducts scapula and rotates it downward; stabilizes scapula

Question 16

Rhomboideus Minor: Origin, insertion, action

Answer 16

Origin: Cervical and thoracic vertebrae
Insertion: Scapula
Action: Elevates, adducts scapula and rotates it downward; stabilizes scapula

Question 17

Infraspinatus: Origin, insertion, action

Answer 17

Origin: Scapula
Insertion: Humerus
Action: Laterally rotates and adducts arm

Question 18

Supraspinatus: Origin, insertion, action

Answer 18

Origin: Scapula
Insertion: Humerus
Action: Abducts arm

Question 19

Terres Major: Origin, insertion, action

Answer 19

Origin: Scapula
Insertion: Humerus
Action: Extends, adducts, rotates humerus

Question 20

Splenius: Origin, insertion, action

Answer 20

Origin: cervical and thoracic vertebrae
Insertion: Temporal and occipital bone
Action: extends and rotates head

Question 21

Serratus Ventralis (anterior): Origin, insertion, action

Answer 21

Origin: Ribs
Insertion: Scapula
Action: Abducts scapula and rotates it upward

Question 22

Serratus Ventralis (posterior): Origin, insertion, action

Answer 22

Origin: Vertebrae
Insertion: Ribs
Action: elevates ribs

Question 23

Spinalis (thoracis): Origin, insertion, action

Answer 23

Origin: thoracic and lumbar vertebrae
Insertion: thoracic vertebrae
Action: extends vertebrae column

Question 24

Longissimus thoracis: Origin, insertion, action

Answer 24

Origin: sacrum
Insertion: thoracic vertebrae and ribs
Action: Extend and bend vertebral column

Question 25

Longissimus Cervicis: Origin, insertion, action

Answer 25

Origin: thoracic vertebrae Insertion: cervical vertebrae Action: Extends cervical vertebrae

Question 26

Longissimus Capitis: Origin, insertion, action

Answer 26

Origin: thoracic and cervical vertebrae Insertion: Temporal bone Action: Laterally flex and extend head

Question 27

Iliocostalis: Origin, insertion, action

Answer 27

Origin: ribs Insertion: C7 vertebrae; lower ribs Action: extends and bends vertebral column

Question 28

Multifidus: Origin, insertion, action

Answer 28

Origin: Sacrum, ilium, C, T, L vertebrae Insertion: vertebrae above origin Action: Straightens and rotates vertebral column

Question 29

Pectoralis Major: Origin, insertion, action

Answer 29

Origin: Clavicle, sternum, ribs Insertion: humerus Action: Flexes, adducts and rotates shoulder upward

Question 30

Pectoralis Minor: Origin, insertion, action

Answer 30

Origin: Ribs Insertion: Scapula Action: Depresses scapula, rotates shoulder upward

Question 31

External Oblique: Origin, Insertion, action

Answer 31

Origin: Ribs Insertion: ilium; linea alba Action: Compresses abdomen, flexes vertebral column

Question 32

Internal Oblique: Origin, insertion, action

Answer 32

Origin: ilium Insertion: lower ribs, linea alba Action: Compresses abdomen, flexes vertebral column

Question 33

Transversus Abdominis: Origin, insertion, action

Answer 33

Origin: ilium, ribs Insertion: Sternum, linea alba, pubis Action: compresses abdomen, flexes vertebral column

Question 34

Rectus Abdominis: Origin, insertion, action

Answer 34

Origin: pubis Insertion: sternum, ribs Action: compresses abdomen, flexes vertebral column

Question 35

Sternocleidomastoid: Origin, Insertion, Action

Answer 35

Origin: Sternum, clavicle Insertion: temporal bone Action: flex and rotate head

Question 36

Sternohyoid: Origin, insertion, action

Answer 36

Origin: sternum (manubrium), clavicle Insertion: hyoid bone Action: Depresses hyoid bone

Question 37

Mylohyoid: Origin, insertion, action

Answer 37

Origin: Mandible Insertion: Hyoid bone Action: elevates floor of mouth

Question 38

Digastric: Origin, insertion, action

Answer 38

Origin: mandible Insertion: hyoid bone Action: depresses floor of mouth

Question 39

Masseter: Origin, insertion, action

Answer 39

Origin: zygomatic arch; maxilla insertion: mandible Action: elevates and protracts mandible

Question 40

Temporalis: Origin, insertion, action

Answer 40

Origin: Temporal bone Insertion: mandible Action: elevates mandible

Question 41

Sternothyroid: Origin, insertion, action

Answer 41

Origin: sternum (manubrium) Insertion: Thyroid cartilage Action: depresses thyroid cartilage

Question 42

Thyrohyoid: Origin, insertion, action

Answer 42

Origin: thyroid cartilage Insertion: hyoid bone Action: elevates thryoid cartilage, depresses hyoid bone

Question 43

Cricothyroid: Origin, insertion, action

Answer 43

Origin: cricoid cartilage of larynx Insertion: thyroid cartilage Action: produce tension and elongates vocal cords

Question 44

Geniohyoid: Origin, insertion, action

Answer 44

Origin: Mandible Insertion: hyoid bone Action: Draws hyoid bone and tongue anteriorly