Lab 2: Muscles origin, insertion, and action Flashcards Preview

Biology 227 Lab > Lab 2: Muscles origin, insertion, and action > Flashcards

Flashcards in Lab 2: Muscles origin, insertion, and action Deck (27)
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1

Iliopsoas M.

Origin: Ilium, Sacrum, T12, and lumbar vertebrae
Insertion: Lesser trochanter and proximal femur
Action: Hip flexion and abduction of thigh

2

Gluteus Maximus

Origin: Ilium, Sacrum, Cocyx
Insertion: Gluteal Tuberosity
Action: Extends and abducts thigh

3

Gluteus Medius

Origin: Lateral surface of Ilium
Insertion: Greater trochanter
Action: Abducts and medially rotates thigh

4

Sartorius

Origin: Anterior superior iliac spine
Insertion: Medial aspect of proximal tibia
Action: Flexes, abducts, and laterally rotates thigh

5

Rectus Femoris

Origin: Anterior inferior iliac spine
Insertion: Tibial tuberosity
Action: Flexes the thigh and extends the leg

6

Vastus muscle group

Origin: Greater trochanter, intertrochanteric line, proximal femoral diaphysis
Insertion: Tibial tuberosity
Action: Extends the leg

7

Adductor muscle group
longus in front, magnus in back

Origin: Pubic bone
Insertion: Linea aspera
Action: Addcuts, medially rotates thigh

8

Biceps Femoris

Origin: Ischial tuberosity, linea aspera
Insertion: Head of fibula, lateral condyle of tibia
Action: Extends laterally rotates thigh, flexes leg

9

Semitendinosus

Origin: Ischial tuberosity
Insertion: Proximal, medial tibia
Action: Extends, medially rotates thigh, flexes leg

10

Semimembranosus

Origin: Ischial tuberosity
Insertion: Proximal, medial tibia, lateral condyle of femur
Action: Extends, medially rotates thigh, flexes leg

11

Gastrocnemius

Origin: Medial and lateral femoral condyles
Insertion: Posterior calcaneus
Action: Plantarflexes foot, flexes leg

12

Tibialis Anterior

Origin: Proximal tibia
Insertion: Base of first metatarsal and medial cuneiform
Action: Dorsiflexes and inverts foot

13

Orbicularis oculi

Origin: Orbital regions of frontal and maxillary bones
Insertion: Skin around the orbit and eyelids
Action: Closes, squints eyes

14

Orbicularis Oris

Origin: Maxilla, mandible
Insertion: Skin and connective tissue around the lips
Action: Closes, protrudes lips

15

Masseter

Origin: Zygomatic arch
Insertion: Angle and lateral surface of mandibular ramus
Action: Elevates the madible

16

Sternocleidomastoid

Origin: Manubriu, medial clavicle
Insertion: Mastoid process
Action: Head flexion and rotation

17

Trapezius

Origin: Oxxiptal bone, C7, thoracic vertebrae
Insertion: Acromion spine of scapula, clavicle
Action: Stabilizes, raises, rotates scapula

18

Rectus abdominis

Origin: Pubic crest, pubic symphysis
Insertion: Zyphoid process, ribs 5-7
Action: Flexes/rotates vertebral column, increases intraabdominal pressure

19

External oblique

Origin: Lower 8 ribs
Insertion: Linea alba
Action: Flexes, rotates, and laterally flexes trunk.

20

Internal oblique

Origin: Lumbar fascia, iliac crest
Insertion: Linea alba, pubic crest, last 3-4 ribs
Action: Flexes, rotates, and laterally flexes trunk.

21

Erector spinae

Origin: Very broad origin- from iliac crest, ribs, and vertebrae
Insertion: Ribs, vertebrae, and the skull
Action: Postural muscles that keep the spine erect; extends trunk

22

Deltoid

Origin: Lateral clavicle, acromion, spine of scapula
Insertion: Deltoid tuberosity of humerus
Action: Abducts, flexes, extends, and rotates arms

23

Pectoralis major

Origin: Clavicle, ribs 1-6, sternum
Insertion: Intertubercular groove of humerus
Action: Flexes and adducts arm

24

Latissimus dorsi

Origin: Iliac crest, lumbar and lower thoracic vertebrae, lower ribs
Insertion: Intertubercular groove of humerus
Action: Extends and adducts arm

25

Biceps brachii

Origin: Coracoid process, glenoid cavity
Insertion: Radial tuberosity
Action: Flexes forearm

26

Triceps brachii

Origin: Scapula, posterior humerus
Insertion: Olecranon process
Action: Extends forearm

27

Brachioradialis

Origin: Distal humerus
Insertion: Styloid process of radius
Action: Flexes forearm