Muscle Origins and Insertions Flashcards
Sternocleidomastoid (SCM)
O: sternal head @ manubrium, clavicular head @ medial 1/3 clavicle
I: mastoid process
Scalenes
O: C3-C6 (anterior), C2-C7 (middle), C5-C6 (posterior)
I: 1st rib (a), 1st rib (m), 2nd rib (p)
Descending part of trapezius
O: Occipital bone, nuchal ligament, C7 ligament
I: lateral 1/3 clavicle, acromium of scapula
Internal intercostals
O: 11 on each side rib cage
I: B/w adjacent ribs from sternum to posterior angle of rib
External intercostals
O: 11 on each side rib cage
I: Extend b/w adjacent ribs
Diaphragm
O: Xiphoid process, ribs 7-12, L1-L3
I: Central tendon of diaphragm
External obliques
O: External ribs 5-12
I: Iliac crest, pubic crest&tubercle, linea albea
Transversus abdominus
O: Costal cartilage ribs 7-12, thoracolumbar fascia, iliac crest, inguinal ligament
I: Linea albea, pubic crest
Rectus abdominus
O: Pubic symphysis, pubic crest
I: Xiphoid process, ribs 5-7
Splenius capitis
O: C7-T3
I: Mastoid process of temporal bone, occipital bone
Splenius cervicis
O: T3-T6
I: C1-C3
Erector spinae: iliocostalis
O: iliac crest & sacrum (lumborum), ribs 7-12 (thoracic), ribs 3-6 (colli)
I: L1-L4 & ribs 5-10 (lumborum), ribs 1-5 (thoracic), C4-C6 (colli)
Erector spinae: longissimus
O: L1-L5 & dosal sacrum & iliac crest (thoracis), T1-T6 (cervicis), C4-T4 (capitis)
I: lumbar & thoracic vertebrae & ribs 2-12 (thoracis), C2-C6 (cervicis), mastoid process (capitis)
Erector spinae: spinalis
O: T11-L3 (thoracis), C7-T2 & nuchal ligament (colli)
I: T2-T8 (thoracis), C2-C4 (colli)
Transversospinales: semispinalis
O: T6-T11 (thoracis), T1-T6 (colli), C4-C7 & T1-T6 (capitis)
I: C6-T4 (thoracis), C2-C5 (colli), occipital bone (capitis)
Transversospinales: rotatores
O: thoracic vertebrae
I: spinous process of vertebrae (short: 1 vertebral level above, long: 2 vertebral levels above)
Pec major
O: medial clavicle (clavicular), manubrium & sternal body (sternocostal), external oblique aponeurosis (abdominal)
I: greater tubercle of humerus
Pec minor
O: anterior ribs 3-5
I: coracoid process of scapula
Subclavius
O: superior 1st rib and costal cartilage
I: middle 1/3 of clavicle
Serratus anterior
O: anterior ribs 1-8
I: medial border of scapula (anterior)
Trapezius
O: occipital bone, nuchal ligament, C7-T12
I: lateral clavicle, acromion, spine of scapula
Latissimus dorsi
O: T7-T12 & L1-L5, thoracolumbar fascia, posterior iliac crest, ribs 9-12
I: intertubecular groove of humerus
Levator scapulae
O: C1-C4
I: superior angle & medial border of scapula to spine of scapula
Rhomboid major
O: T2-T5
I: medial border scapula, inferior to spine of scapula
Rhomboid minor
O: C7-T1
I: medial border of scapula (near spine)
Deltoid
O: lateral 1/3 clavicle, acromion, spine of scapula
I: deltoid tuberosity
Supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle humerus
Infraspinatus
O: infraspinous fossa of scapula
I: greater tubercle of humerus
Teres minor
O: lateral border of scapula
I: greater tubercle of humerus
Subscapularis
O: subscapular fossa of scapula
I: lesser tubercle of humerus
Teres major
O: inferior angle of scapula
I: lesser tubercle of humerus
Coracobrachialis
O: coracoid process of scapula
I: middle 1/3 of humerus
Biceps bracii
O: supraglenoid tubercle (long head), coracoid process (short head)
I: radial tuberosity
Bracialis
O: anterior distal 1/2 of humerus
I: proximal ulna (coronoid process&tuberosity)
Brachioradialis
O: lateral supracondylar ridge (humerus)
I: lateral aspect of distal radius
Triceps brachii
O: posterior proximal humerus (medial & lateral heads), infraglenoid tubercle (long head)
I: olecranon
Anconeus
O: lateral epicondyle
I: olecranon & proximal ulna
Transversospinales: multifidi
O: iliac spine, dorsal sacrum, lumbar, thoracic, C4-C7
I: lumbar, thoracic & cervical vertebrae
