Determine the anatomical movements indicated in the
diagrams
Slide 3
Pectoantebrachialis (not in humans) Pectoralis major Pectoralis
minor Xiphihumeralis (not in humans)
Slide 4
NO HUMAN HOMOLOG Origin: manubrium (sternum) Insertion: fascia
of forelimb near elbow Action: rotates forelimb and draws limb
toward chest (adduction)
Slide 5
Origin: Clavicle, sternum, ribs 1-6 Insertion: Greater tubercle
of humerus Action: rotate forelimb and draw toward chest
(adduction)
Slide 6
Origin: Sternum (xiphoid process) Insertion: Proximal half of
humerus Action: Rotate forelimb and draw toward chest
(adduction)
Slide 7
NO HUMAN HOMOLOG Origin: Sternum (xiphoid process) Insertion:
By narrow tendon near proximal end of humerus Action: Rotate
forelimb and draw towards chest (adduction)
Largest muscle of the back Origin: Last 6 thoracic vertebrae,
all lumbar vertebrae and iliac crest Insertion: Intertubercular
groove (humerus) Action: Pulls forelimb dorsocaudally
Slide 10
Largest muscle of the back Origin: Last 6 thoracic vertebrae,
all lumbar vertebrae and iliac crest Insertion: Intertubercular
groove (humerus) Action: Pulls forelimb dorsocaudally
Slide 11
Paired superficial muscles that make up the lateral walls of
the abdomen Origin: Lower ribs Insertion: Iliac crest Action: Trunk
movement flexion, ab compression, lateral rotation
Slide 12
Paired muscles deep to the external obliques Origin: Iliac
crest Insertion: Last three ribs Action: Same as external
obliques
Slide 13
Most superficial muscles of the abdomen; largest muscle of the
abdomen Origin: pubis Insertion: Xiphoid process, Rib cage Action:
Flex the vertebral column
Slide 14
Biology corner Human Muscles Pectoantebrachialis Pectoralis
major Pectoralis minor Xiphihumeralis Lattisimus dorsi External
obliques Rectus abdominus
Slide 15
Biology corner Human Muscles Teres Major Pectoralis Major
Latissimus dorsi Serratus anterior External obliques Rectus
abdominus
Slide 16
Slide 17
Muscle of the shoulder and upper forelimb
Slide 18
Trapezius in humans Region: shoulder Action: pulls clavicle
forward and upward, draws the scapula dorsally; allows forward
extension of the humerus Antagonists: rotator cuff, latissimus
dorsi, pectoralis major, subscapularis Origin: Insertion:
Slide 19
Deltoid in Humans Location: Shoulder Action: forward extension
of the humerus, flexes the elbos Antagonists: rotator cuff,
latissimus dorsi, pectoralis major, subscapularis Origin:
Insertion:
