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Nghia UALR > Muscular System 3 > Flashcards

Muscular System 3 Flashcards

1
Q

Major Skeletal Muscles in the Head

A
  • Frontalis
  • Occipitalis
  • Temporalis
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2
Q

Major Skeletal Muscles in the face & neck

A
  • Buccinator
  • Platysma
  • Masserter
  • Sternocleidomastoid
  • Zygomaticus Major
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3
Q

Frontalis

A

Raises the eyebrows

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4
Q

Occipitalis

A
  • Connected by Frontalis by wide, thin tendinous membrane
  • Aids the Frontalis
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5
Q

Temporalis

A
  • Aids in chewing (mastication)
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6
Q

Buccinator

A
  • Origin = Mandible, maxilla
  • Insertion = Angle of mouth
  • Action = Aids in chewing, blowing air out
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7
Q

Platysma

A
  • Origin = Connective Tissue in Upper Chest
  • Insertion = Inferior edge of Mandible
  • Action = pulls the angles of mouth down
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8
Q

Masseter

A
  • Origin = Inferior edge of Zygomatic bone
  • Insertion = Mandible
  • Action = Prime mover in Mastication
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9
Q

Sternocleidomastoid

A
  • Origin = Sternum, clavicle
  • Insertion = Mastoid process of Temporal Bone
  • Action = Turns face laterally, pulls the head down
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10
Q

Zygomaticus Major

A
  • Origin = Zygomatic Bone
  • Insertion = Angles of the mouth
  • Action = Pulls the corners of the mouth upward
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11
Q

The pectoral girdle moves what bones…?

A

They move the scapula & clavicle

  • So the insertion of these muscles is on one of these 2 bones
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12
Q

Why is it necessary to move the Scapula & Clavicle?

A
  • As the Upper Limb moves (with its great ROM)
  • The Pectoral Girdle must move with it;
    • Glenoid fossa of the Scapula must stay aligned with the head of the humerus to keep the shoulder joint intact
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13
Q

The Pectoral Girdle

Origins (anchoring point)

A

-are medial/proximal to the muscles

  • Muscles:
    • Trapezius
    • Rhomboid
    • Levator Scapulae
    • Serratus Anterior
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14
Q

Trapezius

A
  • Origin = Occipital Bone, Cervical & Thoracic Vertebrae
  • Insertion = Clavicle, Scapulae
  • Action = Rotates, raises or lowers Scapula
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15
Q

Rhomboid

A
  • Origin = Upper Thoracic Vertebrae
  • Insertion = Medial Edge of Scapula
  • Action = Retracts, elevates, & rotates Scapula
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16
Q

Levator Scapulae

A
  • Origin = Cervical Vertebrae
  • Insertion = Medial edge of Scapula
  • Action = Elevates Scapula
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17
Q

Serratus Anterior

A
  • Origin = Outer surface of ribs
  • Insertion = Anterior surface of scapula
  • Action = Pulls scapula anteriorly & downward
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18
Q

Muscles that move:

the Arm

Arm

A
  • From Shoulder joint to Elbow joint
    • Muscles insert on the Humerus
  • Movement of the arm around the Shoulder Joint
    • moves the Entire Upper Limb
  • Muscles
    • Pectoralis Major
    • Latissimus dorsi
    • Deltoid
19
Q

Pectoralis Major

A
  • Origin = Clavicle, Sternum, Ribs
  • Insertion = Humerus
  • Action = Flexes & Adducts
20
Q

Latissimus dorsi

A
  • Origin = Thoracic, lumbar, sacral vertebrae
  • Insertion = Humerus
  • Action = Extends, adducts, rotates
    • Pulling arms down & back
    • “Rowing” motion
21
Q

Deltoid

A
  • Origin = Scapula & Clavicle
  • Insertion= Humerus
  • Action = Abducts, extends, & flexes
    • 3 Parts
      • Anterior (flexes)
      • Middle (abducts)
      • Posterior (extends)
22
Q

Location of the forearm

Also define brachii & ceph

A
  • From elbow joint to hand
  • Brachii = Latin for arm
  • Ceph = means head
23
Q

Most muscles in the forearm have ….

Most muscles in the forearm also move….

A

Most muscles have:

  • Origin in the arm (humerus)
  • Insertion on the ulnar &/or radial bones

Moves the forearm

  • around the elbow joint
24
Q

Biceps brachii

A
  • Origin = Scapula (2) points
  • Insertion = Radius
  • Action = Flexes & laterally rotates
25
Q

Brachiallis

A
  • Origin = Humerus
  • Insertion = Ulna
  • Action = Flexes
26
Q

Brachioradialis

A
  • Origin = Distal humerus
  • Insertion = Distal radius
  • Action = Flexes
27
Q

Triceps brachii

A
  • Origin = Scapula (1) & Humerus (2) points
  • Insertion = Olecranon process of ulna
  • Action = Extends
28
Q

Supinator

A
  • Origin = Lateral epicondyle of humerus ; Proximal Ulna
  • Insertion = Lateral surface of radius
  • Action = Laterally rotates
29
Q

Pronator teres

A
  • Origin = Medial epicondyle of humerus ; Proximal Ulna
  • Insertion = Lateral surface of radius
  • Action = Medially rotates
30
Q

**The Hand** …

  1. Includes:
  2. Muscles Insert:
  3. Proper name for the term:

Wrist:

Thumb:

Finger:

A
  1. Includes the wrist, palm, and fingers
  2. Muscles Insert on some structures within the hand
  3. Wrist: Carpi

Thumb: Pollic

Finger: Digit

31
Q

Flexor Digitorum Superficialis

A
  • Origin = Distal Humerus ; Proximal ulna & radius
  • Insertion = Tendons of the fingers
  • Action = Flexes fingers & hand
32
Q

Flexor Pollicus Longus

A
  • Origin = Anterior surface of radius
  • Insertion = Distal phalanx of thumb
  • Action = Flexes thumb
33
Q

Flexor carpi radialis

A
  • Origin = Medial epicondyle of humerus
  • Insertion = 2nd & 3rd metacarpals, radial side
  • Action = Flexes wrist, abducts hand
34
Q

Flexor carpi ulnaris

A
  • Origin = Medial epicondyle of humerus & olecranon process of ulna
  • Insertion = Carpals & metacarpals, ulnar side
  • Action = Flexes wrist, adducts hand
35
Q

Extensor Digitorum

A
  • Origin = Distal humerus
  • Insertion = Posterior surface of phalanges in finger 2-5
  • Action = Extends fingers
36
Q

Extensor Pollicus Longus

A
  • Origin = Middle of the ulna
  • Insertion = Distal phalanx of thumb
  • Action = Extends the thumb
37
Q

Extensor carpi ulnaris

A
  • Origin = Distal humerus
  • Insertion = 5th metacarpal, ulnar side
  • Action = Extends wrist, adducts hand
38
Q

Extensor carpi radialis

A
  • Origin = Distal humerus
  • Insertion = 2nd metacarpal, radial side
  • Action = Extends wrist, abducts hand
39
Q

Muscles of the Abdominal Wall have attachments to the:

A
  • Thoracic Cage
  • Pelvic Girdle
  • Connective tissue structures
40
Q

Muscles of the abdominal wall functions to;

A
  • Tenses the abdominal wall to support the structures inside the abdomen
  • Flex the vertebral column
    • Strong abdominal muscles can help “back pain”
41
Q

Rectus Abdominis

A
  • Origin = Superior edge of Pubis
  • Insertion = Xiphoid process of sternum, lower ribs
  • Action =
    • Tenses abdominal wall
    • Flexes vertebral column
    • Has dense connective tissue running transversely for support
    • Gives muscle an appearence of being segmented
42
Q

Linea alba

A
  • Band of dense connective tissue that extends from:
    • Xiphoid process of the sternum to the superior edge of the symphysis pubis
  • Serves as a site of attachment for several of the abdominal wall muscles
43
Q

External Oblique

A
  • Origin = outer surface of lower ribs
  • Insertion = outer edge of iliac crest & linea alba
  • Action = tenses abdominal wall

Nghia UALR (6 decks)

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