Muscles Of The Arm Flashcards
What is the Proximal and Distal Attachment of the Pectoralis Major?
Proximal:
Clavicular Head: anterior surface of medial half of clavicle
Sternocostal Head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle
Distal:
Lateral lip of intertubercular sulcus of humerus
What is the Proximal and Distal Attachment of the Pectoralis Minor?
Proximal: 3rd-5th ribs near their costal cartilages
Distal: Medial border & superior surface of coracoid process
What is the Proximal and Distal Attachment of the Subclavius?
Proximal: junction of 1st rib & it’s costal cartilage
Distal: Inferior surface of Middle third of the clavicle
What is the Proximal and Distal Attachment of the Serratus anterior?
Proximal: external surfaces of lateral parts of 1st-8th ribs
Distal: anterior surface of medial border of scapula
What is the Proximal and Distal Attachment of the Trapezius?
Proximal:
Medial 3rd of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7-T12 vertebrae
Distal:
Lateral 3rd of clavicle; acromion & spine of scapula
What is the Proximal and Distal Attachment of the Latissimus Dorsi?
Proximal:
Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, & inferior 3 or 4 ribs
Distal:
Floor of intertubercular sulcus of humerus
What is the Proximal and Distal Attachment of the Levator Scapulae?
Proximal:
posterior tubercles of transverse processes of C1-C4 vertebrae
Distal:
Medial border of scapula superior to root of scapular spine
What is the Proximal and Distal Attachment of the Rhombpid minor and major?
Proximal:
Minor: nuchal ligament; spinous processes of C7 & T1 vertebrae
Major: spinous processes of T2-T5 vertebrae
Distal:
Minor: smooth triangular area at medial end of scapular spine
Major: medial border of scapula from level of spine to inferior angle
What is the Proximal and Distal Attachment of the Deltoid?
Proximal: lateral 3rd of clavicle; acromion and spine of scapula
Distal: Deltoid tuberosity of humerus
What is the Proximal and Distal Attachment of the Supraspinatus?
Proximal: Supraspinous fossa of scapula
Distal: Superior facet of greater tubercle of humerus
What is the Proximal and Distal Attachment of the Infraspinatus?
Proximal: Infraspinous fossa of scapula
Distal: Middle facet of greater tubercle of humerus
What is the Proximal and Distal Attachment of the Teres Minor?
Proximal: Middle part of lateral border of scapula
Distal: inferior facet of greater tubercle of humerus
What is the Proximal and Distal Attachment of the Teres Major?
Proximal: Posterior surface of inferior angle of scapula
Distal: medial lip of intertubercular sulcus of humerus
What is the Proximal and Distal Attachment of the Subscapularis?
Proximal: Subscapular fossa
Distal: lesser tubercle of humerus
What is the Proximal and Distal Attachment of the Biceps Brachii?
Proximal:
Short head: tip of coracoid process
Long head: supraglenoid tubercle of scapula
Distal:
Tuberosity of radius & fascia of forearm via bicipital aponeurosis
What is the Proximal and Distal Attachment of the coracoid brachialis?
Proximal: tip of coracoid process of scapula
Distal: Middle 3rd of medial surface of humerus
What is the Proximal and Distal Attachment of the Brachialis?
Proximal: distal half of anterior surface of humerus
Distal: coronoid process and tuberosity of ulna
What is the Proximal and Distal Attachment of the Triceps Brachii?
Proximal:
Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove
Distal:
Proximal end of olecranon of ulna & fascia of forearm
What is the Proximal and Distal Attachment of the Anconeus?
Proximal: lateral epicondyle of humerus
Distal: lateral surface of olecranon & superior part of posterior surface of ulna
What is the Proximal and Distal Attachment of the Pronator Teres?
Proximal:
Ulnar head: Coronoid process
Humeral head: Medial epicondyle of humerus
Distal:
Middle of convexity of lateral surface of radius
What is the Proximal and Distal Attachment of the Flexor Carpi Radialis?
Proximal: Medial epicondyle of humerus
Distal: Base of 2nd metacarpal Flexes and abducts hand
What is the Proximal and Distal Attachment of the Palmaris Longus?
Proximal: Medial epicondyle of humerus
Distal: Distal half of flexor retinaculum and apex of palmar aponeurosis
What is the Proximal and Distal Attachment of the Flexor Carpi Ulnaris?
Proximal:
Humeral head: Medial epicondyle of humerus
Ulnar head: Olecranon and posterior border (via aponeurosis)
Distal: pisiform, hook of hamate, 5th metacarpal
What is the Proximal and Distal Attachment of the Flexor Digitorum Superficialis?
Proximal:
Humeroulnar head: Medial epicondyle
Radial head: superior half of anterior border
Distal: Shafts of Middle phalanges of medial four digits
What is the Proximal and Distal Attachment of the Flexor Digitorum Profundus?
Proximal:
Proximal 3/4 of medial and anterior Surfaces of ulna and interrosseous membrane
Distal:
Medial part: Bases of distal phalanges of 4th & 5th digits
Lateral part: Bases of distal phalanges of 2nd & 3rd digits
What is the Proximal and Distal Attachment of the Flexor Pollicis Longus?
Proximal:Anterior surface of radius & adjacent interrosseous membrane
Distal: Base of distal phalanx of thumb
What is the Proximal and Distal Attachment of the Pronator Quadratus?
Proximal: Distal 1/4 of anterior surface of ulna
Distal: Distal 1/4 of anterior surface of radius
What is the Proximal and Distal Attachment of the Brachioradialis?
Proximal: Proximal 2/3 of supraepicondylar ridge of humerus
Distal: lateral surface of distal end of radius proximal to styloid process
What is the Proximal and Distal Attachment of the Extensor Carpi Radialis Longus?
Proximal: Lateral supraepicondylar ridge of humerus
Distal: Dorsal aspect of base of 2nd metacarpal
What is the Proximal and Distal Attachment of the Extensor Carpi Radialis Brevis?
Proximal: lateral epicondyle of humerus
Distal: Extensor expansions of medial four digits
What is the Proximal and Distal Attachment of the Extensor Digiti Minimi?
Proximal: Lateral epicondyle of humerus
Distal: Extensir expansion of 5th digit
What is the Proximal and Distal Attachment of the Extensor Carpi Ulnaris?
Proximal:
Lateral epicondyle of humerus; posterior border of ulna via a shared aponeurosis
Distal: Dorsal aspect of base of 5th metacarpal
What is the Proximal and Distal Attachment of the Supinator?
Proximal: Lateral epicondyle of humerus; radial collateral & anular ligaments; supinator fossa; crest of ulna
Distal: Lateral, posterior & anterior surfaces of proximal third of radius
What is the Proximal and Distal Attachment of the Extensor Indicis?
Proximal: Posterior surface of distal third of ulna and interrosseous membrane
Distal: Extensor expansion of 2nd digit
What is the Proximal and Distal Attachment of the Abductor Pollicis Longus?
Proximal: Posterior surface of proximal halves of ulna, radius & interosseous membrane.
Distal: base of 1st metacarpal
What is the Proximal and Distal Attachment of the Extensor Pollicis Longus?
Proximal: Posterior surface of Middle third of ulna and interrosseous membrane
Distal: Dorsal aspect of base of distal phalanx of thumb
What is the Proximal and Distal Attachment of the Extensor Pollicis Brevis?
Proximal: Posterior surface of distal third of radius and interosseous membrane
Distal: Dorsal aspect of base of proximal phalanx of thumb
What is the Proximal Attachment of the Opponens Pollicis, Abductor Pollicis Brevis & Flexor Pollicis Brevis.
Flexor retinaculum & tubercles of scaphoid & trapezium
What is the Distal Attachment of the Opponens Pollicis?
Lateral side of 1st metacarpal
What is the Distal Attachment of the Abductor Pollicis Brevis & Flexor Pollicis Brevis?
Lateral side of base of proximal phalanx of thumb
What is the Proximal and Distal Attachment of the Adductor Pollicis?
Proximal:
Oblique head: bases of 2nd & 3rd metacarpals, capitate & adjacent carpals.
Transverse head: Anterior surface of shaft of 3rd metacarpal
Distal: medial side of base of proximal phalanx of thumb
What is the Proximal and Distal Attachment of the Abductor Digiti Minimi?
Proximal: pisiform
Distal: medial side of base of proximal phalanx of 5th digit
What is the Proximal and Distal Attachment of the Flexor Digiti Minimi Brevis?
Proximal: Hook of hamate and flexor retinaculum
Distal: Medial side of base of proximal phalanx of 5th digit
What is the Proximal and Distal Attachment of the Opponens Digiti?
Proximal: Hook of hamate & flexor retinaculum
Distal: Medial border of 5th metacarpal
What is the Proximal and Distal Attachment of the Lumbricals?
Proximal:
1st & 2nd:
Lateral two tendons of flexor Digitorum profundus (unipennate)
3rd & 4th: Medial 3 tendons of 2nd-5th digits of flexor Digitorum profundus (bipennate)
Distal:
Lateral sides of extensor expansions of 2nd-5th digits
What is the Proximal and Distal Attachment of the Dorsal interossei?
Proximal: adjacent sides of two metacarpals (bipennate)
Distal: Bases of proximal phalanges; extensor expansions of 2nd-4th digits
What is the Proximal and Distal Attachment of the Palmar interossei?
Proximal: Palmar surfaces of 2nd, 4th and 5th metacarpals (unipennate)
Distal: Bases of proximal phalanges; extensor expansions of 2nd, 4th & 5th digits
What Muscles does the Musculocutaneous nerve innervate?
Biceps Brachii (long head & short head)
Brachialis
Coracobrachialis
What muscles are innervated by the Musculocutaneous nerve?
Biceps Brachii short head and long head
Brachialis
Coracobrachialis
What muscles are innervated by the radial nerve?
Triceps Brachii short head/ lateral head/ medius head Brachioradialis Extensor Carpi Ulnaris Extensor Carpi Radialis longis/ Brevis Extensor digitorum of hand Abductor Pollicis longis Supinator Anconeus
What muscles are innervated by the median nerve?
Palmaris longis Flexor Digitorum Superficialis Flexor Digitorum profundus Flexor Carpi Radialis Pronator Teres Lumbricals Opponens Pollicis Abductor Pollicis Brevis Flexor Pollicis Brevis
What muscles are innervated by the ulnar nerve?
Flexor Carpi Ulnaris Palmaris Brevis Abductor Digiti Minimi Flexor Digiti Minimi Brevis Opponens Digiti Minimi Adductor Pollicis transverse Adductor Pollicis oblique Interosseous
What muscles are innervated by the Axillary?
Deltoid
