Anatomy Flashcards
(81 cards)
Origin of Sternocleidomastoid
Manubrium of
sternum, clavicle
Insertion of Sternocleidomastoid
Mastoid process of
temporal bone
Action of Sternocleidomastoid
Flexion of the neck when
both heads contract
together and rotation to the
shoulder of opposite side if
independent
Origin of Pectoralis Major
Clavicle, sternum,
costal cartilages of ribs
2-6
Insertion of Pectoralis Major
Humerus
Action of Pectoralis Major
Flexes, adducts, and medially
rotates the arm at the
shoulder
Origin of Deltoid
Acromion and spinous
process of scapula;
clavicle
Insertion of Deltoid
Deltoid tuberosity of
humerus
Action of Deltoid
Abduction, flexion,
extension, abduction, and
medial and lateral rotation of
the arm at the shoulder
Origin of Trapezius
Occipital bone;
spinous processes of
C7-T12
Insertion of Trapezius
Acromion and spinous
process of scapula,
clavicle
Action of Trapezius
Extends the head, rotates
and adducts scapula; elevates
or depresses the scapula
Origin of Latissmus Dorsi
Lower vertebrae, ribs
1-9, iliac crest
Insertion of Latissmus Dorsi
Humerus
Action of Latissmus Dorsi
Extends, adducts, and
medially rotates shoulder
Origin of Rectus Abdominis
Pubic crest and
symphysis
Insertion of Rectus Abdominis
Xiphoid process,
costal cartilages of ribs
5-7
Action of Rectus Abdominis
Flexes and rotates vertebral
column; depresses ribs;
compresses abdomen
Origin of External Oblique
Ribs 4-12
Insertion of External Oblique
Linea alba, pubic crest,
iliac crest
Action of External Oblique
Flexes and rotates vertebral
column; depresses ribs;
compresses abdomen
Origin of Triceps Brachii
Humerus
Insertion of Triceps Brachii
Olecranon process of
ulna
Action of Triceps Brachii
Prime mover of elbow
extension