Muscles Practical - Page 1

Question 1

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 1

Muscle: Epicranius Frontalis

Action:

1) Draws scalp forward (anteriorly)
2) Raises Eyebrows (which wrinkles forehead)

Question 2

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 2

Muscle: Epicranius Occipitalis

Action: Draws scalp backwards (posteriorly)

Question 3

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 3

Muscle: Orbicularis Oculi

Action: Sphincter - closes eye (winking, blinking, etc.)

Question 4

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 4

Muscle: Obicularis Oris

Action: Sphincter - closes mouth / purses lips (kissing)

Question 5

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 5

Muscle: Zygomaticus major

Action: Draws corner of mouth latterally & superiorly (smiling!)

Question 6

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 6

Muscle: Buccinator

Action: Compresses cheek to masticate (chew), suck, and / or blow (whistle)

Question 7

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 7

Muscle: Platysma

Action: Draws lower lip down (pouting) & Depresses mandable

Question 8

1) Muscle:
2) Action:
3) Origin:
4) Insertion:

Answer 8

1) Muscle: Masseter

2) Action: Elevates Mandible

3) Origin: Maxilla & Zygomatic Arch

4) Insertion: Mandible (ramus)

Question 9

1) Muscle:
2) Action:
3) Origin:
4) Insertion:

Answer 9

1) Muscle: Temporalis

2) Action: Elevates Mandible & Retracts Mandible

3) Origin: Temporal bone

4) Insertion: Mandible (ramus & coronoid)

Question 10

1) Muscle:
2) Action:
3) Origin:
4) Insertion:

Answer 10

1) Muscle: Sternocleidomastoid

2) Action: Rotates head from side-to-side / Flexes neck (paired)

3) Origin: Mandubrium & clavicle

4) Insertion: Temporal bone (mastoid process)

Question 11

1) Muscle:
2) Action:
3) Origin:
4) Insertion:

Answer 11

1) Muscle: Rectus Abdominis

2) Action: Compresses abdomen; Flexes vertebral column

3) Origin: Pubic Crest & Symphysis

4) Insertion: Xiphoid & costal cartilage ribs 5-7

Question 12

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 12

1) Muscle: External Oblique

2) Action:

1) Compresses abdomen
2) Flexes vertibral column
3) Laterally flexes vertebral column

Question 13

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 13

1) Muscle: Internal Oblique

2) Action:

1) Compresses abdomen
2) Flexes vertibral column
3) Laterally flexes vertebral column

Question 14

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 14

1) Muscle: Transverse Abdomonis

2) Action: Compresses Abdomen

Question 15

1) Muscle: (bottom arrow)
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 15

1) Muscle: Diaphram

2) Action: Pulls central tendon down to expand thoracic cavity during inspiration

Question 16

1) Muscle: (top arrow)
2) Action:
3) Origin: n/a
4) Insertion: n/a

Answer 16

1) Muscle: Intercostals

2) Action: Internal (expiration) & External (inspiration)

Question 17

1) Muscle:
2) Action:
3) Origin:
4) Insertion:

Answer 17

1) Muscle: Seratus Anterior

2) Action: Abducts scapula (moves forward); Rotation towards chest

3) Origin: Ribs

4) Insertion: Scapula

Question 18

1) Muscle:
2) Action:
3) Origin: n/a
4) Insertion:

Answer 18

1) Muscle: Trapezius

2) Action:

a) Abducts, Elevates, Depresses, or Rotates scapula upward.
b) Extends head.

4) Insertion: Scapula & Clavicle