Flashcards
Muscles Part 2

Cards in this deck (30)
- 1Deltoid Anterior *Origin: lateral third of clavicle
Insertion: Deltoid tuberosity of humerus
Innervation: Axillary n. (C5,6)
Action: flexes and medially rotates arm at shoulder
- 2Deltoid Middle *Origin: Acromion
Insertion: Deltoid tuberosity of humerus
Innervation: Axillary n. (C5, 6)
Action: abducts arm at shoulder
- 3Deltoid Posterior *Origin: spine of the scapula
Insertion: Deltoid tuberosity of humerus
Innervation: Axillary n. (C5, 6)
Action: extends and laterally rotates arm at shoulder
- 4SubscapularisOrigin: Subscapular fossa of scapula
Insertion: Lesser tubercle of humerus
Innervation: Upper and lower subscapular n. (C5, 6, 7)
Action: Medially rotates arm at shoulder and adducts it; helps hold humeral head in glenoid cavity
- 5Supraspinatus *Origin: Supraspinatus fossa of scapula
Insertion: Greater tubercle of humerus
Innervation: Suprascapular n. (C4,5,6)
Action: Helps deltoid abduct arm at shoulder; acts as rotator cuff muscle
- 6Infraspinatus *Origin: Infraspinatus fossa of scapula
Insertion: Greater tubercle of humerus
Innervation: Suprascapular n. (C5, 6)
Action: Laterally rotates arm at shoulder; helps hold head in glenoid cavity
- 7Teres Minor *Origin: Upper 2/3 lateral border of scapula
Insertion: Greater tubercle of humerus
Innervation: Axillary n. (C5, 6)
Action: Laterally rotates arm at shoulder; helps to hold head in glenoid cavity
- 8Teres Major *Origin: Inferior angle & lower 1/3 lateral border of scapula
Insertion: Medial lip of intertubercular groove of humerus
Innervation: Lower subscapular n. (C5, 6)
Action: Adducts arm and medially rotates shoulder, extends shoulder at GH joint
- 9Coracobrachialis *Origin: Coracoid process of scapula
Insertion: Middle third of medial surface of humerus
Innervation: Musculocutaneous n. (C5, 6, 7 )
Action: Helps to flex and adduct arm at shoulder
- 10Triceps Brachii - Long Head *Origin: Infraglenoid tubercle of scapula
Insertion: Olecranon of ulna and fascia of forearm
Innervation: Radial n. (C6, 7, 8, T1)
Action: Extends forearm at elbow; prime mover for elbow extension
- 11Triceps Brachii - Lateral Head *Origin: Posterior surface of humerus
Insertion: Olecranon of ulna and fascia of forearm
Innervation: Radial n. (C6, 7, 8 )
Action: Extends forearm at elbow; prime mover for elbow extension
- 12Triceps Brachii - Medial HeadOrigin: Posterior surface of humerus; inferior to radial groove
Insertion: Olecranon of ulna and fascia of forearm
Innervation: Radial n. (C6, 7, 8 )
Action: Extends forearm at elbow; prime mover for elbow extension
- 13AnconeousAction: Assists triceps in extending elbow

- 14Brachialis *Origin: Distal half of anterior humerus
Insertion: Coroniod process and tuberosity of ulna
Innervation: Musculocutaneous n. (C5, 6 )
Action: Flexes forearm at elbow in all positions
- 15Brachioradialis *Origin: Lateral supracondylar ridge of humerus
Insertion: Lateral surface of distal end of radius
Innervation: Radial n. (C 5, 6, 7 )
Action: Flexes forearm at elbow
- 16SupinatorAction: Supinates forearm

- 17Biceps Brachii *Origin: Short head - coracoid process. Long head - Supraglenoid tubercle of scapula
Insertion: Radial tuberosity and fascia of forearm via bicipital aponeurosis
Innervation: Musculocutaneous nerve (C5-6)
Action: Flexes forearm at elbow, supinates flexed forearm
- 18Pronator Teres *Origin: Medial epicondyle of humerus and Coroniod process of ulna
Insertion: Middle of lateral surface of radius
Innervation: Median n. (C6, 7)
Action: Pronates forearm and flexes elbow
- 19Pronator QuadratusOrigin: Distal anterior surface of ulna
Insertion: Distal anterior surface of radius
Innervation: Median n. (anterior interosseous) (C8, T 1)
Action: Pronates forearm
- 20Palmaris Longus *Origin: Medial epicondyle of humerus
Insertion: Palmar aponeurosis & flexor retinaculum
Innervation: Median nerve (C7, 8)
Action: Flexes hand at wrist; tightens palmar aponeurosis
- 21Flexor Carpi Ulnaris *Origin: Humeral head - medial epicondyle of humerus. Ulnar head - olecranon of ulna
Insertion: Pisiform bone, hook of hamate bone and fifth metacarpal bone
Innervation: Ulnar nerve (C7, 8)
Action: Flexes hand at wrist and adducts it
- 22Flexor Carpi Radialis *Origin: Medial epicondyle of humerus
Insertion: Base of second metacarpal bone
Innervation: Median nerve (C6, 7)
Action: Flexes and abducts hand at wrist
- 23Flexor Digitorum SuperficialisOrigin: Humeroulnar head: medial epicondyle of humerus. Radial head: superior anterior radius
Insertion: Bodies of middle phalanges of medial four digits
Innervation: Median nerve (C7, 8, T 1)
Action: Flexes middle phalanges of medial four digits
- 24Flexor Digitorum ProfundusOrigin: Proximal ¾ of medial & anterior surfaces of ulna & interosseous membrane
Insertion: Bases of distal phalanges of medial 4 digits
Innervation: Medial part - Ulnar n. (C8, T1). Lateral part - median n. (C8, T1)
Action: Flexes distal phalanges of medial four digits; assist with wrist flexion
- 25Flexor Policis Longus *Origin: Anterior surface of radius and adjacent interosseous membrane
Insertion: Base of distal phalanx of thumb
Innervation: Median nerve
(anterior interosseous) (C8, T1)
Action: Flexes phalanges of first digit (thumb)
- 26Extensor Carpi Radialis LongusOrigin: Lateral supracondylar ridge of humerus
Insertion: Base of second metacarpal bone
Innervation: Radial nerve (C6, 7)
Action: Extends and abducts hand at wrist
- 27Extensor Carpi Radialis BrevisOrigin: Lateral epicondyle of humerus
Insertion: Base of third metacarpal bone
Innervation: Radial nerve (deep branch) (C7, 8)
Action: Extends and abducts hand at wrist
- 28Extensor Carpi UlnarisOrigin: Lateral epicondyle of humerus and posterior ulna
Insertion: Base of fifth metacarpal bone
Innervation: Radial nerve (posterior interosseous) (C7, 8)
Action: Extends and adducts hand at wrist
- 29Extensor Digitorum *Origin: Lateral epicondyle of humerus
Insertion: Extensor expansions of medial four digits
Innervation: Radial nerve (posterior interosseous) (C7, 8)
Action: Extends medial four digits at
metacarpophalangeal joints; extends hand at wrist joint
- 30Extensor Hood/ExpansionExtensor digitorum tendons through the dorsum of the hand, where they are joined distally by a patter of oblique interconnections. The expansion extends onto the dorsum of the proximal phalanx of each digit & forms a movable hood, which moves distally when extended. It's found in the dorsum of the 2nd to 5th digits.
Each extensor tendon blends with extensor expansion along its central axis & is separated from metacarpophalangeal joint by a small bursa
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- Anatomy Flashcards on Muscles Part 2, created by Elvy Fuentes on 14/02/2019.
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- Elvy Fuentes
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