Transcript of Muscle of the Thorax and Abdomen. Determine the anatomical movements indicated in the diagrams.
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- Muscle of the Thorax and Abdomen
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- Determine the anatomical movements indicated in the
diagrams
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- Pectoantebrachialis (not in humans) Pectoralis major Pectoralis
minor Xiphihumeralis (not in humans)
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- NO HUMAN HOMOLOG Origin: manubrium (sternum) Insertion: fascia
of forelimb near elbow Action: rotates forelimb and draws limb
toward chest (adduction)
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- Origin: Clavicle, sternum, ribs 1-6 Insertion: Greater tubercle
of humerus Action: rotate forelimb and draw toward chest
(adduction)
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- Origin: Sternum (xiphoid process) Insertion: Proximal half of
humerus Action: Rotate forelimb and draw toward chest
(adduction)
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- NO HUMAN HOMOLOG Origin: Sternum (xiphoid process) Insertion:
By narrow tendon near proximal end of humerus Action: Rotate
forelimb and draw towards chest (adduction)
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- Lattisimus dorsi External obliques Rectus abdominus
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- Largest muscle of the back Origin: Last 6 thoracic vertebrae,
all lumbar vertebrae and iliac crest Insertion: Intertubercular
groove (humerus) Action: Pulls forelimb dorsocaudally
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- Largest muscle of the back Origin: Last 6 thoracic vertebrae,
all lumbar vertebrae and iliac crest Insertion: Intertubercular
groove (humerus) Action: Pulls forelimb dorsocaudally
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- 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
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- Paired muscles deep to the external obliques Origin: Iliac
crest Insertion: Last three ribs Action: Same as external
obliques
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- Most superficial muscles of the abdomen; largest muscle of the
abdomen Origin: pubis Insertion: Xiphoid process, Rib cage Action:
Flex the vertebral column
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- Biology corner Human Muscles Pectoantebrachialis Pectoralis
major Pectoralis minor Xiphihumeralis Lattisimus dorsi External
obliques Rectus abdominus
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- Biology corner Human Muscles Teres Major Pectoralis Major
Latissimus dorsi Serratus anterior External obliques Rectus
abdominus
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- Muscle of the shoulder and upper forelimb
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- 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:
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- Deltoid in Humans Location: Shoulder Action: forward extension
of the humerus, flexes the elbos Antagonists: rotator cuff,
latissimus dorsi, pectoralis major, subscapularis Origin:
Insertion:
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- Action: Origin: Insertion:
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- Muscle of the Shoulder and Forelimb: VENTRAL
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Longus/brevis Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Communis/lateralis Action: Origin: Insertion:
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- Muscle of the Shoulder and Forelimb: DORSAL
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Muscle of the Head and Neck
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Action: Origin: Insertion:
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- Sternomastoid/cleidomastoid Action: Origin: Insertion: