UE Muscles Flashcards
Origin/Insertion Action Innervation
Pectoralis Major Origin & Insertion
Origin:
Medial half clavicle
Manubrium
Sternum body
1-7 rib cartilage
Insertion:
Humerus greater tubercle
Pectoralis Major Function & Innervation
Function:
Shoulder flexion
Shoulder medial/internal rotation
Shoulder adduction
Scapular protraction
Scapular depression
Innervation:
Lateral pectoral n.
Pectoralis Minor Origin & Insertion
Origin:
Ribs 2-5
Insertion:
Coracoid process medial border
Pectoralis Minor Function & Innervation
Function:
Scapular downward rotation
Scapular protraction
Scapular depression
Innervation:
Medial pectoral n.
Serratus Anterior Origin & Insertion
Origin:
Ribs 1-8
Insertion:
Scapula costal surface medial border
Serratus Anterior Function & Innervation
Function:
Scapular upward rotation
Scapular protraction
Scapular depression
Innervation:
Long Thoracic n.
Trapezius Origin & Insertion
Origin:
External occipital protuberance
Superior nuchal line
Ligamentum nuchae
Spinous processes
Supraspinous liggs C7-T12
Insertion:
Upper- Clavicle lateral 1/3
Middle- Acromion and Scapula upper lip
Lower- Scapula Spine
Trapezius Function & Innervation
Function:
Upper- Scapular elevation; Scapular upward rotation
Middle- Scapular retraction
Lower- Scapular depression; Scapular upward rotation
Innervation:
Cranial n XI (Accessory n.)
Rhomboid Major & Minor Origin & Insertion
Origin:
Ligamentous nuchae
Spinous processes C7-T5
Insertion:
Scapula medial border
Rhomboid Major & Minor Function & Innervation
Function:
Shoulder adduction
Scapular elevation
Scapular downward rotation
Innervation:
Dorsal scapular n.
Levator Scapulae Origin & Insertion
Origin:
Transverse process C1-C4
Insertion:
Scapula medial border between superior angle and root of spine
Levator Scapulae Function & Innervation
Function:
Scapular elevation
Scapular downward rotation
Innervation:
Ventral rami of spinal nerves C3-C4
Dorsal scapular n.
Sternocleidomastoid Origin & Insertion
Origin:
Manubrium
Clavicle medial portion
Insertion:
Mastoid process (temporal bone)
Sternocleidomastoid Function & Innervation
Function:
Same side flexion
Ipsilateral side rotation
Innervation:
Cranial n XI (Accessory n.)
Latissimus Dorsi Origin & Insertion
Origin:
Spinous processes of T7-T12
Lumbar and sacral fascia
Inferior angle of scapula
Insertion:
Humerus intertubercular groove
Latissimus Dorsi Function & Innervation
Function:
Shoulder medial/internal rotation
Shoulder adduction
Shoulder extension
Innervation:
Thoracodorsal n.
Deltoid Origin & Insertion
Origin:
Anterior- Clavicle lateral end
Middle- Acromion
Posterior- Scapula spine
Insertion:
Humerus deltoid tuberosity
Deltoid Function & Innervation
Function:
Shoulder abduction
Anterior- Shoulder flexion
Posterior- Shoulder extension
Innervation:
Axillary n.
Teres Major Origin & Insertion
Origin:
Scapula inferior angle
Insertion:
Humerus lesser tubercle crest
Teres Major Function & Innervation
Function:
Shoulder medial/internal rotation
Shoulder extension
Shoulder adduction
Innvervation:
Lower subscapular n.
Coracobrachialis Origin & Insertion
Origin:
Scapula coracoid process
Insertion:
Humerus medial aspect of middle shaft
Coracobrachialis Function & Innervation
Function:
Elbow flexion
Innervation:
Musculocutaneous n.
Subscapularis Origin & Insertion
Origin:
Scapula subscapular fossa
Insertion:
Humerus lesser tubercle
Subscapularis Function & Innervation
Function:
Shoulder medial/internal rotation
Shoulder adduction
Innervation:
Upper subscapular n.
Lower subscapular n.
Supraspinatus Origin & Insertion
Origin:
Scapula supraspinatus fossa
Insertion:
Humerus upper facet of greater tubercle
Supraspinatus Function & Innervation
Function:
Shoulder abduction (0-15 degrees)
Innervation:
Suprascapular n.
Infraspinatus Origin & Insertion
Origin:
Scapula infraspinatus fossa
Insertion:
Humerus middle facet of greater tubercle
Infraspinatus Function & Innervation
Function:
Shoulder lateral/internal rotation
Innervation:
Suprascapular n.
Teres Minor Origin & Insertion
Origin:
Scapula lateral border
Insertion:
Humerus lower facet of greater tubercle
Teres Minor Function & Innervation
Function:
Shoulder lateral/external rotation
Innervation:
Axillary n.
Long Head Biceps Origin & Insertion
Origin:
Scapula supraglenoid tubercle
Insertion:
Radius bicipital tuberosity
Long Head Biceps Function & Innervation
Function:
Elbow extension
Shoulder extension
Innervation:
Musculocutaneous n.
Short Head Biceps Origin & Insertion
Origin:
Scapula coracoid process
Insertion:
Radius bicipital tuberosity
Short Head Biceps Function & Innervation
Function:
Elbow flexion
Supination
Shoulder flexion
Innervation:
Musculocutaneous n.
Brachialis Origin & Insertion
Origin:
Humerus distal aspect of anterior surface
Insertion:
Proximal ulna coronoid process and tuberosity
Brachialis Function & Innervation
Function:
Elbow flexion
Innervation:
Musculocutaneous n.
Lateral Head Triceps Origin & Insertion
Origin:
Posterior humerus
Superior and lateral to radial groove
Insertion:
Ulna olecranon process
Long Head Triceps Origin & Insertion
Origin:
Scapula infraglenoid tubercle
Insertion:
Ulna olecranon process
Lateral Head Triceps Function & Innervation
Function:
Elbow extension
Shoulder extension
Innervation:
Radial n.
Long Head Triceps Function & Innervation
Function:
Elbow extension
Shoulder extension
Innervation:
Radial n.
Medial Head Triceps Origin & Insertion
Origin:
Posterior humerus
Inferior and medial to radial groove
Insertion:
Ulna olecranon process
Medial Head Triceps Function & Innervation
Function:
Elbow extension
Shoulder extension
Innervation:
Radial n.
Brachioradialis Origin & Insertion
Origin:
Humerus upper 2/3 lateral supracondylar ridge
Insertion:
Distal radius near styloid process
Brachioradialis Function & Innervation
Function:
Elbow flexion (especially mid-prone position)
Innervation:
Radial n.
Anconeus Origin & Insertion
Origin:
Humerus posterior side of lateral epicondyle
Insertion:
Between olecranon process and proximal surface of posterior ulna
Anconeus Origin & Insertion
Origin:
Elbow extension (weak)
Innervation:
Radial n.
