Origins and Insertions Flashcards
Origins and Insertions of Muscles
Platysma
O: Inferior clavicle
I: Mandible
Sternocleidomastoid
O: Manubrium sterni, clavicle
I: Mastoid process
Scalene
O: Cervical Vertebrae
I: First and second ribs
Levator Scapulae
O: C-1 – C-4
I: Medial scapula
Erector Spinae
O: Last four thoracic vertebrae
I: Most cranial thoracic and cervical vertabrae
longissimus
O: Transverse process
I: Transverse process
Latissimus dorsi
O: T6 – t12, iliac crest, rib 3 and 4
I: Intertubercular groove of humerus
Intercostals
O: Ribs 1 - 11
I: Ribs 2-12
Subcostales
O: Inner surface of one rib
I: Inner surface of second or third rib above
Serratus Posteior (inferior)
O: T11 – L3
I: Rib 9 – 12
Serratus Posterior (Superior)
O: Superior C7 – T3
I: Rib 2 – 5
Transverse Abdominis
O: Ribs an-d Iliac Crest
I: Insert into pubic tubercle
Rectus abdominis
O: Pubis
I: Ribs 5 – 7 and sternum
Trapezius
O: Occipital, spinous processes of C7 – T 12
I: Clavicle, acromion, spine of scapula
Rhomboids
O: C7 – T5
I: Medial border of scapula
Pec Major
O: Medial half of clavicle, sternum, costal cartilages
I: Intertubercular groove of humerus
Pec Minor
O: Rib 3 -5
I: Coracoid process and scapular
Subclavius
O: Rib 1
I: Subclaviun groove of clavicle
Serratus anterior
O: Upper 8 or 9 ribs
I: Medial margin of scapular
Deltoid
O: Clavicle, acromion, spine of scapula
I: Deltoid tuberosity of humerus
Teres major
O: Inferior angle of scapula
I: Intertubercular sulcus of humerus
Supraspinatus
O: Supraspinous fossa of scapula
I: Superior facet of greater tubercle of humerus
Infraspinatus
O: Infraspinous fossa of scapula
I: Middle facet of greater tubercle of humerus
Teres minor
O: Lateral scapula
I: Inferior facet of greater tubercle of humerus
Subscapularis
O: Subscapular fossa
I: Lesser tubercle of humerus
Coracobrachialis
O:Coracoid process of scapula
I: Medial humerus