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Biceps Brachii Origins
Short Head: Coracoid process of scapula
Long Head: supraglenoid tubercle of scapula
Biceps Brachii Insertions
Radial tuberosity and bicipital aponeurosis
Biceps Brachii Actions
flexes shoulder and elbow and supinates the forearm
Biceps brachii inneravtion
musculocutaneous nerve
Deltoid origins
lateral 1/3 of the clavicle, acromion, and spine of the scapula
Deltoid Insertions
deltoid tuberosity of the humerus
Deltoid Actions
Anterior Fibers: flex and medially rotate the shoulder
Posterior Fibers: extend and laterally rotate the shoulder
All Fibers contracting: abducts shoulder
Deltoid innervation
axillary nerve
diaphragm origins
xiphoid process, costal margin and vertebral bodies L1-3
diaphragm insertions
central tendon of the diaphragm
Diaphragm actions
presses the abdominal viscera inferiorly, increasing the volume of the thoracic cavity
Diaphragm innervations
Phrenic nerve
Gastrocnemius origins
Lateral head: lateral condyle of the femur
Medial Head: medial condyle of the femur
Gastrocnemius insertions
calcaneus
Gastrocnemius actions
knee flexion and plantar flexion in the ankle
Gastrocnemius innervation
tibial nerve
occipitofrontalis origins
occipitalis: superior nuchal line
frontalis: epicranial aponeurosis
occipitofrontalis insertions
occipitalis: epicranial aponeurosis
frontalis: SQ tissue of eyebrows
occipitofrontalis actions
wrinkles forehead and elevates eyebrows
occipitofrontalis innervation
facial nerve
rectus abdominis origins
pubic bone and pubic symphysis
rectus abdominis insertions
xyphoid process and costal cartilages of 5-7
rectus abdominis actions
flexes the trunk
rectus abdominis innervation
intercostals nerve
rhomboid major origins
spinous processes of T2-T5
rhomboid major insertions
medial border of the scapula
rhomboid major actions
retracts the scapula
rhomboid major innervation
dorsal scapular nerve
sartorius origins
ASIS
sartorius insertions
medial surface of the proximal tibia
sartorius actions
flexes, abducts and laterally rotates the hip and flexes knee
sartorius innervation
femoral nerve
serrated anterior origins
surface of the 1st to 8th ribs at the side of the chest
serratus anterior insertions
anterior aspect of the entire medial border of the scapula
serratus anterior actions
protracts the scapula
serratus anterior innervation
long thoracic nerve
sternocleidomastoid origin
sternal head: anterior surface of manubrium
clavicular head: medial 1/3 of clavicle
sternocleidomastoid insertions
mastoid process of temporal bone
sternocleidomastoid actions
unilateral contraction: draws the mastoid process down toward the same side
bilateral contraction: flexes the neck
sternocleidomastoid innervation
spinal accessory nerve
triceps brachii origins
long head: infraglenoid tubercle of scapula
lateral and medial heads: posterior shaft of humerus
triceps brachii insertions
olecranon process of the ulna
triceps brachii actions
extends forearm and the long head helps stabilize the humerus within the shoulder joint
triceps brachii innervation
radial nerve