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ABCP > Muscle innervation function origin and insertion > Flashcards

Muscle innervation function origin and insertion Flashcards

1
Q

Deltoid

A

Nerve innervation: axillary nerve

Origin: Clavicle, acromion + spine of scapula

Insertion: Deltoid tuberosity

Function: Anterior fibres- flexion and medial rotation
Posterior fibres- extension and lateral rotation
Middle fibres- the major abductor of the arm

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2
Q

Trapezius

A

Nerve innervation: Accessory nerve
Origin: Skull, nuchall ligament and spinous process C7-T12
Insertion:Clavicle, acromion and scapula spine
Function: upper fibres- elevate scapula
Middle fibres- retract scapula
Lower fibres- pull scapula inferiorly

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3
Q

Lattisimus Dosi

A

Nerve innervation: Thoracodorsal nerve
Origin: T7-T12
Insertion: Intertubercular sulcus of the humerus
Function: extends, abducts and medially rotates the upper limb

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4
Q

Serratus anterior

A

Nerve innervation: long thoracic nerve
Origin: lateral aspects of ribs 1-8
Insertion: Medial border of scapula
Function: Rotates the scapula

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5
Q

Teres minor

A

Nerve innervation: Axillary nerve
Origin: Posterior surface of the scapula
Insertion: Greater tubercle of the humerus
Function: laterally rotates the arm

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6
Q

Teres major

A

Nerve innervation: Thoracodorsal nerve
Origin: posterior surface of the inferior angle of the scapula
Insertion: Medial lip of the intertubercular groove
Function: Adducts the shoulder and medially rotates the arm

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7
Q

Pectoralis major

A

Nerve innervation: medial and lateral pectoral nerves
Origin: Clavicular head - Anterior surface of the medial clavicle
Sternocostal head- Anterior surface of the sternum
Insertion: Intertubercular sulcus of the humerus
Function: Adducts and medially rotates the upper limb

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8
Q

Pectoralis minor

A

Nerve innervation: medial pectoral nerve
Origin: 3rd, 4th and 5th ribs
Insertion: Coracoid process
Function: Stabilises the scapula by drawing it anteriorinferiorly against the thoracic wall

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9
Q

Subscapularis

A

Nerve innervation: upper and lower subscapular nerves
Origin: Subscapular fossa
Insertion: Lesser tubercle of the humerus
Function: medially rotates the arm

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10
Q

Supraspinatous

A

Nerve innervation: Suprascapular nerve
Origin: supraspinous fossa
Insertion: Greater tubercle of the humerus
Function: Abducts the arm 0-15 and assists deltoid for 15-90 degrees

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11
Q

Infraspinatous

A

Nerve innervation: Suprascapular nerve
Origin: Infraspinous fossa
Insertion: Greater tubercel of the humerus
Function: Laterally rotates arm

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12
Q

Biceps brachii

A

Nerve innervation: Musculocutaneous
Origin: Long head- Superglenoid tubercle
Short head coracoid process
Insertion: Radial tuberosity and bicipital aponeurosis
Function: Supination of the forearm - flexes the arm the elbow and the shoulder

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13
Q

Triceps brachii

A

Nerve innervation: Radial nerve
Origin: Long head- infraglenoid tubercle
Lateral head- humerus (superior to radial groove)
Medial head- humerus (inferior to radial groove)
Insertion: Olecrannon of the ulna
Function: Extension of the arm at the elbow

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14
Q

Coracobrachialis

A

Nerve innervation: Musculocutaneous nerve
Origin: Coracoid process
Insertion: Medial side of the humerus
Function: Flexion of the arm at the shoulder and weak adduction

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15
Q

Brachialis

A

Nerve innervation: Musculocutaneous nerve
Origin: Medial and lateral surface of the humeral shaft
Insertion: Ulna tuberosity
Function: Flexion of the elbow

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16
Q

Aconeus

A

Nerve innervation: Radial nerve
Origin: Lateral epicodyle
Insertion: Posterior and lateral part of the olecranon
Function: Extends and stablises the elbow joint
Abducts the ulna

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17
Q

Pronator teres

A

Nerve innervation: median nerve
Origin: Medial epicondyle and coronoid process of ulna
Insertion: Mid shaft of the radius
Function: Pronation of the forearm

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18
Q

Flexor carpi radialis

A

Nerve innervation: median nerve
Origin: Medial epicondyle
Insertion: Base of metacarpal 2 and 3
Function: flexion and abduction of the wrist

19
Q

Palmaris longus

A

Nerve innervation: Median nerve
Origin: Medial epicondyle
Insertion: Flexor retinaculum
Function: Flexion at the wrist

20
Q

Flexor carpi ulnaris

A

Nerve innervation: ulnar nerve
Origin: Medial epicondyle
Insertion: Pisiform carpal bone
Function: Flexion and adduction of the wrist

21
Q

Flexor digitorum Superfilicialis

A

Nerve innervation: Median nerve
Origin: Medial epicondyle of the radius
Insertion: Base of distal phalanx of the thumb
Function: Flexes the metacrpophalangeal joints and proximal interphalangeal joints at the 4 fingers, and flexes the wrist

22
Q

Flexor digitorum profunus

A

Nerve innervation: medial half - ulnar
Lateral half - anterior interosseous nerve
Origin: Ulna
Insertion: Splits into 4 and attaches to distal phalanges of 4 fingers
Function: Only muscle that can flex the distal interphalangeal joints of the fingers. Flexes at metacarpophalangeal joints and at the wrist

23
Q

Flexor digiti minimi brevis

A

Nerve innervation: Ulnar nerve
Origin: Hook of hamate and flexor retinaculum
Insertion: Base of proximal phalanx of the little finger
Function: Flexes the MCP joint of the little finger

24
Q

Pronator quadratus

A

Nerve innervation: Anterior interosseous nerve
Origin: Anterior surface of the ulna
Insertion: Anterior surface of radius
Function: Pronates the forearm

25
Q

Opponens pollicis

A

Nerve innervation: median nerve
Origin: Tubercle of trapezium
Insertion: Lateral margin of the metacarpal of the thumb
Function: Opposes the thumb by medially rotating and flexing the metacarpal on the trapezium

26
Q

Abductor pollicis brevis

A

Nerve innervation: Median nerve
Origin: Tubercles of scaphoid and trapezium
Insertion: Lateral side of the proximal phalanx of the thumb
Function: Abducts the thumb

27
Q

Flexor pollicis brevis

A

Nerve innervation: Median nerve
Origin: Tubercel of the trapezium and associated flexor retinaculum
Insertion: Base of the proximal phalanx of the thumb
Function: Flexes the MCP joint of the thumb

28
Q

Opponens digiti minimi

A

Nerve innervation: Ulnar nerve
Origin: Hook of hamate and associated flexor retinaculum
Insertion: Medial margin of metacarpal 5
Function: Rotates the metacarpal of the little finger towards the palm producing opposition

29
Q

Abductor digiti minimi

A

Nerve innervation: Ulnar nerve
Origin: Pisiform and tendon of FCU
Insertion: Base of proximal phalanx of the little finger
Function:abducts the little finger

30
Q

Supinator

A

Nerve innervation: Deep branch of radial nerve
Origin: Lateral epicondyle and posterior surface of ulna
Insertion: posterior surface of the radius
Function: supinates the forearm

31
Q

Extensor Carpi radialis brevis

A

Nerve innervation: radial nerve
Origin: Lateral epicondyle
Insertion: Metacarpal bones 2 and 3
Function: extends and abducts the wrist

32
Q

Extensor carpi radialis longus

A

Nerve innervation: Radial nerve
Origin: supracondylar ridge
Insertion: Metacarpal bones 2 and 3
Function: Extends and abducts the wrist

33
Q

Extensor carpi ulnaris

A

Nerve innervation: Ulnar nerve
Origin: Medial epicondyle
Insertion: Pisiform carpal bone
Function: Extension and adduction of the wrist

34
Q

Extensor digitorum

A

Nerve innervation: deep branch of the radial nerve
Origin: Lateral epicondyle
Insertion: Splits in 4 and inserts into extensor hood of each finger
Function: Extends medial 4 fingers at the MCP and IP joints

35
Q

Rhomboid major

A

Nerve innervation: Dorsal scapular nerve
Origin: T2 to T5
Insertion: Medial border of scapula
Function:Retracts and rotates the scapula

36
Q

Rhomboid minor

A

Nerve innervation: dorsal scapula nerve
Origin: C7 to T1
Insertion: Medial border of scapulae
Function: Retracts and rotates the scapula

37
Q

Levator scapulae

A

Nerve innervation: Dorsal scapular nerve
Origin: C1 to C4
Insertion: Medial border of scpaulae
Function: Elevates the scapulae

38
Q

lateral two lumbricals

A

Nerve innervation : Palmar digital branch of median nerve

39
Q

Adductor pollicis longus

A

Nerve innervation: Deep branch of ulnar nerve
Origin: Head 1 - metacarpal 3
head 2- capitate
Insertion: base of proximal phalanx of the first
Function: Base of proximal phalanx of the thumb

40
Q

Palmar interossei

A

Nerve innervation: deep branch of ulnar nerve
Origin: metacarpals
Insertion: Base of proximal phalanges and extensor hood
Function: Adduct the finger at the MCP joint

41
Q

Dorsal interossei

A

Nerve innervation: deep ulnar nerve
Origin: Metacarpals
Insertion: extensor hood and base of proximal phalanges
Function:

42
Q

Extensor indices proprius

A

Nerve innervation: posterior interosseous nerve
Origin: Posterior surface of ulna and interossseous membrane
Insertion: Extensor hood of index finger
Function: Extends the index finger

43
Q

Lumbricals

A

Nerve innervation: Index and middle fingers - median nerve
Medial two lumbricals - ulnar nerve
Origin: Tendon of flexor digitorum profundus
Insertion: Extensor hood
Function: Flex at the MCP joint, and extend at the interphalangeal joints of each finger

44
Q

Subclavius

A

Nerve innervation: subclavian nerve
Origin: Junction of first rib and costal cartilage
Insertion: Subclavius Nerve to subclavius Junction of 1st rib and costal cartilage Inferior surface of the middle 1/3 of the clavicle
Function: Anchors and depresses the clavicle

ABCP (28 decks)

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