Anatomy, Arcadia PA
Terms
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Trapezius
Origin -
medial third of the superior nuchal line
spinous process of C7-T12 -
serratus posterior superior
origin -
nuchal lig
spin. process of C7-T3 -
serratus posterior superior
insertion - sup border of 2nd and 4th ribs
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serratus posterior superior
NS - 2nd to 5th intercostal nerves
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serratus posterior inferior
Origin - spinous process of T11-L2
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serratus posterior inferior
Insertion - inferior borders of 8th to 12th ribs near their angles
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serratus posterior inferior
NS - ventral rami of 9th to 12th thoracic spinal nerves
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Latissimus Dorsi
origin - spinous process of inf. 6 Thoracic vert.
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Latissimus Dorsi
insertion - floor of intertubercule groove of humerus
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Latissimus Dorsi
NS - Thoracodorsal Nerve (C6-C8)
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Latissimus Dorsi
Ax -
extends, adducts and medially rotates humerus
raises body toward arms when climbing -
Levator scapulae
origin - posterior tubercules of transverse processes of C1-4
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Levator scapulae
insertion - sup. border of scapula
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Levator scapulae
NS - dorsal scapular nerve (C5) and cervical nerves (C3/4)
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Supraspinatus
Ax - initates and helps deltoid abduct arm and acts with rotator cuff
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infraspinatus
Ax -
Lat rotate arm
help hold head in glen -
Teres Minor
Origin - Superior part of lateral border of scap
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Teres Minor
Insertion - inferior facet on greater tubercle of humerus
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Teres Minor
Ax -
Lat rotate arm
help hold head in glen -
Teres Major
Origin - Dorsal Surface of inf angle of scap
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Teres Major
Insertion - Medial lip of intertubercular groove of humerus
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Teres Major
NS - Lower scapular nerve (C6-7)
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Teres Major
Action -
Adducts arm
Medially rotates arm -
Subscapularis
Ax -
Medially rotates arms
Adduction of arm
Helps hold humerus in glen -
biceps brachii
origin -
short head- tip of coracoid process
long head- supraglenoid tubercle of scapula -
Brachialis
insertion - coronoid process and tuberosity of ulna
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Pectoralis Major
Origin -
Clavicular head- ant surface of medial half of clavicle
Sternocostal- ant surface of sternum and costal cartilages -
Pectoralis Major
Insertion - Lateral lip of intertubercule groove of humerus
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Pectoralis Minor
origin - 3-5th ribs near costal cartilages
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Pectoralis Minor
insertions - medial border and superior surfce of coracoid process of scapula
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Pectoralis Minor
Ax - Stabilizes scapula by drawing it towards Thoracic wall
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Subclavius
origin - junction of 1st rib and its costal cartilage
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Subclavius
Insertion - inferior surface of middle third of clavicle
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subclavius
NS - C5 and C6
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Subclavius
Ax - Anchors and depresses clavicle
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Serratus Anterior
Origin - External surfaces of lateral parts of 1-8th ribs
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Serratus Anterior
Insertion - ant surface of medial border of scapula
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Serratus Anterior
Ax -
protracts scapula
holds it to thoracic wall
rotates scapula -
Posterior Scalene
Origin - Posterior Tubercles of transverse processes of C4-C6 vert
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Posterior Scalene
insertion - External border of 2nd rib
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Posterior Scalene
NS - anterior rami of cervical spinal nerves
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Middle Scalene
Origin - Posterior Tubercles of transverse processes of C2-C7 vert
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Middle Scalene
NS - Anterior rami of cervical spinal nerves
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Anterior scalene
origin - transverse processes of C4-6 vert.
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anterior scalene
NS - cervical spinal nerves C4-6
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Omohyoid
origin - superior border of scapula near the suprascapular notch
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Omohyoid
NS - C1-3 by brach of ansa cervicalis
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Omohyoid
Ax -
Depresses hyoid bone after it has been elevated during swallowing
Depresses, retracts and steadies hyoid bone -
Stylohyoid
Ax - Elevates and retracts hyoid bone, which elongates floor of mouth
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Anterior Belly of Digastric
Origin - digastric fossa of mandible
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Posterior Belly of Digastric
Origin - Mastoid notch of temporal bone
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Digastric
Insertion - Intermediate tendon that attaches to the hyoid bone
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Digastric
Ax -
Depresses mandible
Raises hyoid bone and steadies during swallowing and speaking -
Sternohyoid
NS - Cervial Plexus
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Sternothyroid
NS - Cervical Plexus
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thyrohyoid
origin - oblique ling of thyroid cartilage
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thyrohyoid
insertion - inferior border and greater horn of hyoid bone
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thyrohyoid
NS - cervical plexus
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Thyrohyoid
Ax - Depresses hyoid bone and elevates larynx
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Pronator teres
Origin - Med epicondyle of humerus and coronoid process of ulna
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Pronator teres
Insertion - Middle lat surface of radius
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Pronator quadratus
origin - distal 4th of ant surface of ulna
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Pronator quadratus
insertion - distal 4th of ant surface of radius
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Pronator quadratus
NS - Ant surface of nerve off of median nerve
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Brachioradialis
origin - proximal 2/3 of lat supracondylar ridge of humerus
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Brachioradialis
insertion - distal 4th of ant surface of radius
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Supinator
Origin - Lat Epicondyle of humerus, radial collateral and anular ligaments, supinator fossa and crest of ulna
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Supinator
insertion - lat, post and ant surfaces of proximal 3rd of radius