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a&p 1 > A&P 1.10 > Flashcards

A&P 1.10 Flashcards

1
Q

Muscle Terminology

Define muscle belly

A

fleshy portion of muscle that’s responsible for muscle contraction

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2
Q

Muscle Terminology

Define muscle tendon

A

dense collagen fibers which attach muscle to bone

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3
Q

Muscle Terminology

Define aponeurosis

A

broad, dense sheet of CT that connects - ms-ms
- ms-bone
- ms-skin

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4
Q

Muscle Terminology

Define origin

A
  • proximal or superior attachment
  • attaches on a less movable bone
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5
Q

Muscle Terminology

Define insertion

A
  • distal or inferior attachment
  • attaches on a more movable bone
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6
Q

Muscle Fasciculi

List the 4 ways fasciculi are arranged

A
  1. Parallel
  2. Pennate
  3. Convergent
  4. Circular
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7
Q

Muscle Fasciculi

Describe parallel arrangement

A

Fascicles lay parallel to one another (same fiber direction)

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8
Q

Muscle Fasciculi

Describe pennate arrangement

A
  • feathering arragenemtn of fascicles
  • can be either uni (half feather) or bipennate (full feather)
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9
Q

Muscle Fasciculi

Describe convergent fascicle arrangement

A

fibers have multiple origins that converge at one insertion point

Ex: glutes, deltoids

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10
Q

Muscle Fasciculi

Describe circular fascicle arrangement

A

circle shaped fibers

Ex: orbit, mouth, sphincters

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11
Q

Naming Skeletal Muscles

List the different methods of naming muscles

A
  1. Relative size
  2. Location
  3. Shape
  4. Muscle fiber direction
  5. Number of origins
  6. Location of ms attachment points
  7. Action
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12
Q

Naming Skeletal Muscles

Examples of naming by relative size

A

Gluteus
- Maximus
- Medius
- Minimus

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13
Q

Naming Skeletal Muscles

Examples naming skeletal muscles by location

A

Tibialis anterior vs posterior

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14
Q

Naming Skeletal Muscles

Examples of skeletal muscles named based on shape

A
  • deltoid
  • rhomboids
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15
Q

Naming Skeletal Muscles

Examples of muscles named by fiber direction

A

Rectus femoris

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16
Q

Naming Skeletal Muscles

Examples of muscles named by number of origins

A
  • Triceps
  • Biceps
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17
Q

Naming Skeletal Muscles

Examples of naming skeletal muscles by location of the muscle attachment points

A

Sternocleidomastoid

18
Q

Naming Skeletal Muscles

Examples of naming skeletal muscles by action

A
  • Extensors
  • Flexors
19
Q

Rotator Cuff Muscles

Name the 4 rotator cuff muscles

A
  • Supraspinatus
  • Infraspinatus
  • Teres minor
  • Subscapularis
20
Q

Rotator Cuff Muscles - Location, Origin, Insertion, Action

Supraspinatus

A

L: Posterior shoulder deep
O: Supraspinous fossa of scapula
I: Greater tubercle of humerus (superior facet)
A: ABducts arm at shoulder

21
Q

Rotator Cuff Muscles - Location, Origin, Insertion, Action

Infraspinatus

A

L: Posterior shoulder superficial
O: Infraspinous fossa of scapula
I: Greater tubercle of humers (intermediate facet)
A: Laterally rotates arm at shoulder

22
Q

Rotator Cuff Muscles - Location, Origin, Insertion, Action

Teres Minor

A

L: Posterior axilla superficial
O: Superior 1/2 of lateral border of scapula
I: Greater tubercle of humerus (Inferior facet)
A: Laterally rotates arm at shoulder

23
Q

Rotator Cuff Muscles - Location, Origin, Insertion (Action)

Subscapularis

A

L: Anterior scapula deep
O: Subscapular fossa of scapula
I: Lesser tubercle of humerus
A: Medially rotates arm at shoulder

24
Q

Scapula & Posterior Arm Muscles

List the muscles

A
  • Teres major
  • Triceps brachii
25
Q

Scapula & Posterior Arm Muscles - L, O, I, A

Teres major

A

L: Posterior axilla superficial
O: Inferior angle (lateral side) and lower 1/2 lateral border of scapula
I: Bicipital groove of humerus (medial lip)
A: “_____” of arm at shoulder
- Extension
- ADduction
- Medial rotation

26
Q

Scapula & Posterior Arm Muscles - L, O, I, A

Triceps brachii

A

L: Posterior arm superficial
O:
- Long head: infraglenoid tubercle of scapula
- Lateral head: posterior, proximal half of humerus
- Medial head: posterior, distal half of humerus
I: olecranon process of ulna
A: extends forearm at elbow (long head also extends arm at shoulder)

27
Q

Anterior Arm Muscles

List the muscles

A
  • Brachialis
  • Biceps brachii
28
Q

Anterior Arm Muscles - L, O ,I ,A

Brachialis

A

L: Anterior arm deep
O: Distal 1/2 of anterior surface of humerus
I: Proximal ulna
A: Flexion of forearm at elbow

29
Q

Anterior Arm Muscles - L, O, I, A

Biceps brachii

A

L: Anterior arm superficial
O: - Short head: coracoid process of scapula
- Long head: supraglenoid tubercle of scapula
I: Radial tuberosity and proximal ulna (by way of biciptal aponeurosis)
A: “________” forearm at elbow
- flexion
- supination
(short head also flexes arm at shoulder)

30
Q

Lateral Arm Muscles - L, O, I, A

Deltoid

A

L: Lateral shoulder superficial
O: - Anterior: Lateral 1/3 of clavicle
- Middle: Acromion
- Posterior: Spine of scapula
- I: Deltoid tuberosity of humerus
- A: - Anterior: Flexion, medial rotation
- Mid: ABduction
- Posterior: Extension & lateral rotation of arm at shoulder

31
Q

Deep Posterior/Lateral Forearm Muscles - L, O, I, A

Supinator

A

L: Posterior, lateral forearm deep
O: Lateral epicondyle of humerus & posterior border of ulna
I: Proximal 1/3 of radius
A: Supination of forearm at elbow

32
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Extensor Carpi Radialis Brevis

A

L: Posterior forearm superficial
O: Kateral epicondyle of humerus
I: Base of 3rd metacarpal
A: Extension & radial deviation of hand at wrist

33
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Extensor Carpi Radialis Longus

A

L: Posterior forearm superficial
O: Lateral supracondylar ridge of humerus
I: Base of 2nd metacarpal
A: Extensoin & radial deviation of hand at wrist

34
Q

Deep Posterior Forearm Muscles - L, O, I, A

Extensor Indicis

A

L: Posterior forearm deep
O: Ulna & interosseous membrane
I: Base of intermediate phalanx of index finger
A: Extension of index finger

35
Q

Deep Posterior Forearm Muscles - L, O, I, A

Extensor Pollicis Brevis

A

L: Posterior forearm deep
O: Radius & interosseous membrane
I: Base of proximal phalanx of thumb
A: Extension of thumb

Part of anatomical snuff box

36
Q

Deep Posterior Forearm Muscles - L, O, I, A

Extensor Pollicis Longus

A

L: Posterior forearm deep
O: Middle 1/3 of ulna & interosseous membrane
I: Base of distal phalanx of thumb
A: Extension of thumb

Part of anatomical snuff box

37
Q

Deep Posterior Forearm Muscles - L, O, I, A

Abductor Pollicis Longus

A

L: Posterior forearm deep
O: Ulna, radius & interosseous membrane
I: Base of 1st metacarpal
A: Abduction & extension of thumb

Part of anatomical snuff box

38
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Extensor Digitorum

A

L: Posterior forearm superficial
O: Lateral epicondyle of humerus
I: Distal phalanges of medial 4 digits
A: Extension of phalanges

39
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Extensor Carpi Ulnaris

A

L: Posterior forearm superficial
O: Lateral epicondyle of humerus
I: Base of 5th metacarpal
A: Extension & ulnar deviation of hand at wrist

40
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Extensor Retinaculum (not a muscle)

A

L: CT band around posterior wrist
O: Attaches at distal radius & ulna
I: n/a
A: Keeps extensor tendons from bowing out

41
Q

Superficial Posterior Forearm Muscles - L, O, I, A

Anconeus

A

L: Posterior forearm superficial
O: Lateral epicondyle of humerus
I: Olecranon process & lateral edge of ulna shaft
A: Extends elbow (ABducts ulna during supination)

a&p 1 (15 decks)

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