Muscle Lab/anatomy Flashcards Preview

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Flashcards in Muscle Lab/anatomy Deck (34):
0

Location, action, origins, insertions of:

Frontal is

Cutaneous muscle stretching over forehead to upper eyelid

Draws back scalp, raises eyebrows, wrinkles brows

2 bellies: aponeurosis and region anterior to vertex

Skin above nose and ears

1

Location, action, origins, insertions of:

Orbicularis oculi

Surrounds rim of the orbit

Blinking squinting closes eyes

Frontal and maxilla

Tissues of the eyelid

2

Location, action, origins, insertions of:

Zygomaticus major

From zygomatic arch to corners of mouth

Smiling

Zygomatic bone in front of temporal process

Angle of mouth

3

Location, action, origins, insertions of:

Orbicularis oris

Multilayered; mostly surrounding lips

Purses & protrudes lips- kissing and whistling

Indirectly from mandible, maxilla, and other lip muscles

Encircles mouth; inserts into muscle and skin at angles of mouth

4

Location, action, origins, insertions of:

Temporalis

Fan-shaped, covers parts of temporal, parietal, and frontal

Closes jaw, elevates/retracts mandible, small region helps protract mandible

Temporal fossa

Coronoid process of mandible via tendon that passes deep to zygomatic arch

5

Location, action, origins, insertions of:

Buccinator

Main muscle of cheek; thin/horizontal plane; deep to masseter

Compression of cheeks; holds food between teeth

Molar area of maxilla and mandible

Orbicularis oris

6

Location, action, origins, insertions of:

Masseter

Strong muscle covering lateral mandible

Elevates mandible, closes jaw

Zygomatic bone

Mandible

7

Location, action, origins, insertions of:

Occipitalis

Part of occipitofrontalis muscle

Moves scalp

Occipital and temporal bones

Aponeurosis

8

Location, action, origins, insertions of:

Sternocleidomastoid

Neck

Flexes and rotates head; flexes head towards shoulders

Manubrium and clavicle

Temporal bone

9

Location, action, origins, insertions of:

Scaleni muscles

Four of these: scalene, scalene anterior, scalene middle, scalene posterior

Flexion & rotation of cervical vertebrae

Transverse processes of various cervical vertebrae

Various ribs and vertebrae

10

Location, action, origins, insertions of:

Trapezius

Flat, triangular; mud-upper back

Stabilizes, raises, retracts, and rotates scapula

Occipital bone, spinous process of C-7 & thoracic vertebrae

Continuous insertion along scapula; lateral third of clavicle

11

Location, action, origins, insertions of:

Latissimus dorsi

Broadest muscle of back; dorsi-lateral to trunk, posterior to arm, covered by trapezius superiorly, contributes to posterior wall of axilla

Addicts, extends, & rotates humerus medially bringing arm down in power stroke

Lower thoracic; indirectly via fascia to lumbar and sacral vertebrae

Humerus

12

Location, action, origins, insertions of:

Gluteus Maximus

Forms bulk of buttock mass

Major extensor of thigh

Dorsal ilium, sacrum, and coccyx

Femur

13

Location, action, origins, insertions of

Deltoid

Thick rounded muscle forming shoulder mass

Arm flexor, rotates arm medially, addicts arm, when scapula fixed pulls rib cage upwards, assists in throwing pushing forced inspiration

Surrounds insertion of trapezius and lateral third of clavicle

Humerus

14

Location, action, origins, insertions of:

Serratus anterior

Adjacent to thoracic wall

Abducts (protracts) scapula, rotates scapula upwards while abducting arm, holds scapula to chest wall

Anterior surfaces of first 8 ribs

Scapula: anterior surface and medial border

15

Location, action, origins, insertions of:

Pectoralis major

Chest; upper/axillary (anterior)

Arm flexion, medial rotation, forced inspiration, rib cage elevation

Clavicle and sternum; cartilages of ribs 1-6

Humerus

16

Location, action, origins, insertions of:

External oblique

Anterior & lateral abdominal wall

Flexes vertebral column

Lower 8 ribs

Pubic crest and iliac crest

17

Location, action, origins, insertions of:

Rectus abdominis

Extends from pubis to rib cage; r sheathed by aponeuroses of adjacent lateral muscles

Flex and rotate lumbar region of vertebral column; increase intra-abdominal pressure, use during sit ups

Pubis

Xiphoid process; costal cartilages of ribs 5-7

18

Location, action, origins, insertions of:

Triceps brachii

Posterior compartment of arm

Extends arm at shoulder extends forearm at elbow

Three-headed at: scapula; humerus

By a common tendon to the ulna

19

Location, action, origins, insertions of:

Biceps brachii

Arm

Flexes elbow joint; rotates hand laterally

Scapula: short- coracoid process, long- glenoid cavity

Radius: radial tuberosity

20

Location, action, origins, insertions of:

Brachioradialis

Lateral region on lower arm

Flexes forearm and elbow

Humerus: lateral supracondyle ridge

Radius

21

Location, action, origins, insertions of:

Sartorious

Strap like; longest muscle in humans; runs obliquely across anterior surface of thigh to knee

Flexes thigh & knee, abducts, laterally rotates thigh, cross-legged position

Anterior superior iliac spine

Medial aspects of knee, medial aspects of proximal tibia

22

Location, action, origins, insertions of:

Rectus femoris

Quadriceps group- thigh, anterior aspect

Flexes thigh at hip, extends knee

Acetabulum; anterior iliac spine

Patellar and tibial tuberosity via patellar ligament

23

Location, action, origins, insertions of:

Vastus medialis

Quadriceps group; thigh- medial region

Extend the knee

Linda aspera

Same as rectus femoris: patellar and tibial tuberosity via patellar ligament

24

Location, action, origins, insertions of:

Vastus lateralis

Quadriceps group; thigh- lateral region

Extends and stabilizes knee

Femur, lines aspera

Patellar and tibial tuberosity via patellar ligament

25

Location, action, origins, insertions of:

Pectineal

Short/flat overlies adductor brevis

Adducts, flexes and medially rotates thigh

Pubis and superior ramus

Femur (posterior), runs inferiorly from lesser trochanter to linea aspera

26

Location, action, origins, insertions of:

Gracilis

Long/thin in thigh (medial)

Addicts thigh; flexes and medially rotates leg

Pubis

Tibia (medial), inferior to medial condyle

27

Location, action, origins, insertions of:

Adductor longus

Medial aspect of thigh

Flexes thigh; abducts thigh, medially rotates thigh

Pubis

Linea aspera

28

Location, action, origins, insertions of:

Biceps femoris

Most lateral of hamstrings group

Extend thighs, flexes knee, laterally rotates leg especially when knee is flexed

Long head: ischial tuberosity
Short head: distal femur and linea aspera

Common tendon inserts into fibula (head) and tibia (lateral condyle)

29

Location, action, origins, insertions of:

Gastrocnemius

Posterior leg (calf), superficial pair of bellies

Flexes foot when knee extends, since crosses at knee joint, can flex the knee when foot is dorsiflexed

By 2 head from lateral and medial condyles of femur

Posterior calcaneous via calcaneal tendon

30

Location, action, origins, insertions of:

Soleus

Flat, broad muscle of calf just below gastrocnemius

Plantar flexes foot

Fibula and tibia; popliteal fascia

Calcaneous by Achilles' tendon

31

Location, action, origins, insertions of:

Extensor digitorum longus

Anterolateral surface of leg

Toe extension; dorsiflexes foot

Tibia and fibula

Middle/distal phalanges toes 2-5

32

Location, action, origins, insertions of:

Tibialis anterior

Anterior leg

Dorsiflexion and foot inversion

Tibia

First metatarsal bone

33

Location, action, origins, insertions of:

Tensor fascia lata

Anterolateral aspect of thigh

Flexes, rotates thigh medially

Anterior region of iliac crest and anterior superior iliac spine

Iliotibial band of fascia lata