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25 Cards in this Set
- Front
- Back
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Deltoid |
Action All Fibers: Abduct the shoulder (glenohumeral joint) Anterior Fibers: Flex the shoulder Medially rotate the shoulder Horizontally adduct the shoulder Posterior Fibers: Extend the shoulder Laterally rotate the shoulder Horizontally abduct the shoulder Origin Lateral one-third of the clavicle, acromion and spine of scapula
Insertion Deltoid tuberosity Nerve Axillary C5,6 |
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Trapezuis |
Action Upper fibers: Bilaterally Extend the head and neck Unilaterally Laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Elevate the scapula (scapulothoracic joint) Middle fibers: Adduct the scapula Stabilize the scapula Lower Fibers: Depress the scapula Upwardly rotate the scapula Origin External occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae, and the spinous processes of C-7 through T-12 Insertion Lateral one-third of clavicle, acromion and spine of the scapula Nerve Spinal portion of cranial nerve XI (accessory) and ventral ramus C2, 3, 4 |
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Latissimus Dorsi |
Action Extend the shoulder (glenohumeral joint) Adduct the shoulder Medially rotate the shoulder Origin Inferior angle of the scapula, spinous processes of last six thoracic vertebrae, last three or four ribs, thoracolumbar aponeurosis and posterior iliac crest Insertion Intertubercular groove of the humerus Nerve Thoracodorsal C6, 7, 8 |
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Teres Major |
Action Extend the shoulder (glenohumeral joint) Adduct the shoulder Medially rotate the shoulder Origin Inferior angle and lower one-third of the lateral border of the scapula Insertion Crest of the lesser tubercle of the humerus Nerve Lower subscapular C5, 6, 7 |
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Supraspinatus |
Rotator Cuff Action Abduct the shoulder (glenohumeral joint) Stabilize the head of the humerus in glenoid cavity Origin Supraspinous fossa of the scapula Insertion Greater tubercle of the humerus Nerve Suprascapular C4, 5, 6 |
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Infraspinatus |
Rotator Cuff Action Laterally rotate the shoulder (glenohumeral joint) Adduct the shoulder Stabilize the head of the humerus in glenoid cavity Origin Infraspinous fossa of the scapula Insertion Greater tubercle of the humerus Nerve Suprascapular C(4), 5, 6 |
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Teres Minor |
Rotator Cuff Action Laterally rotate the shoulder (glenohumeral joint) Adduct the shoulder Stabilize the head of the humerus Origin Upper two-thirds of the lateral border of the scapula Insertion Greater tubercle of the humerus Nerve Axillary C5, 6 |
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Subscapularis |
Rotator Cuff Action Medially rotate the shoulder (glenohumeral joint) Stabilize the head of humerus in glenoid cavity Origin Subscapular fossa of the scapula Insertion Lesser tubercle of the humerus Nerve Upper and lower subscapular C5, 6, 7 |
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Rhomboid Major |
Action Adduct the scapula (scapulothoracic joint) Elevate the scapula Downwardly rotate the scapula Origin Spinous processes of T-2 to T-5 Insertion Medial border of the scapula between the spine of the scapula and inferior angle Nerve Dorsal scapular C4, 5 |
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Rhomboid minor |
Action Adduct the scapula (scapulothoracic joint) Elevate the scapula Downwardly rotate the scapula Origin Spinous processes of C-7 and T-1 Insertion Upper portion of the medial border of the scapula, across from the spine of the scapula Nerve Dorsal scapular C4, 5 |
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Levator Scapula |
Action Unilaterally: Elevate the scapula (scapulothoracic joint) Downwardly rotate the scapula Laterally flex the head and neck Rotate the head and neck to the same side Bilaterally: Extend the head and neck Origin Transverse processes of the first through forth cervical vertebrae Insertion Medial border of the scapula, between superior angle and superior portion of the spine of scapula Nerve Cervical 3, 4, and dorsal scapular C4, 5 |
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Serratus Anterior |
Action With the origin fixed: Abduct the scapula (scapulothoracic joint) Upwardly rotate the scapula Depress the scapula Hold the medial border of the scapula against the rib cage With the scapula fixed: May act to elevate the thorax during forced inhalation Origin External surfaces of the upper eight or nine ribs Insertion Anterior surface of the medial border of the scapula Nerve Long thoracic C5, 6, 7, 8` |
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Pectoralis Major |
Action All fibers: Adduct the shoulder (glenohumeral joint) Medially rotate the shoulder Assist to elevate the thorax during forced inhalation (with arm fixed) Upper fibers: Flex the shoulder Horizontally adduct the shoulder Lower fibers: Extend the shoulder Origin Medial half of the clavicle, sternum and cartilage of first through sixth ribs Insertion Crest of the greater tubercle of humerus Nerve Upper fibers: Lateral pectoral C5, 6, 7 Lower fibers: Lateral and medial pectoral C6, 7, 8, T1 |
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Pectoralis Minor |
Action Depress the scapula (scapulothoracic joint) Abduct the scapula Downwardly rotate the scapula With the scapula fixed: Assist to elevate the thorax during forced inhalation Origin Third, forth and fifth ribs Insertion Medial surface of cocacoid process of the scapula Nerve Medial pectoral, with fibers from a communicating branch of the lateral pectoral C(6), 7, 8, T1 |
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Subclavius |
Action Depress the clavicle and draw it anteriorly Elevate the first rib (to assist during inhalation) Stabilize the sternoclavicular joint Origin First rib and cartilage Insertion Inferior surface of middle one-third of clavicle Nerve Subclavian C5, 6 |
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Biceps Brachii |
Action Flex the elbow (humeroulnar joint) Supinate the forearm (radioulnar joint) Flex the shoulder (glenohumeral joint) Origin Short head: Coracoid process of the scapula Long head: Supraglenoid tubercle of scapula Insertion Tuberosity of the radius and aponeurosis of the biceps brachii Nerve Musculocutaneous C5, 6 |
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Triceps Brachii |
Action All heads: Extend the elbow (humeroulnar joint) Long head: Extend the shoulder (glenohumeral joint) Adduct the shoulder Origin Long head: Infraglenoid tubercle of the scapula Lateral head: Posterior surface of proximal half of the humerus Medial head: Posterior surface of distal half of the humerus Insertion Olecranon process of the ulna Nerve Radial C6, 7, 8, T1 |
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Coracobrachialis |
Action Flex the shoulder (glenohumeral joint) Adduct the shoulder Origin Coracoid process of the scapula Insertion Medial surface of mid-humeral shaft Nerve Musculocutaneous C6, 7 |
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Anterior Scalene |
Unilaterally: With the ribs fixed, laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Bilaterally: Elevate the ribs during inhalation Flex the head and neck Origin Transverse processes of third through sixth cervical vertebrae (anterior tubercles) Insertion First rib Nerve C(3), 4-8 |
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Middle Scalene |
Action Unilaterally: With the ribs fixed, laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Bilaterally: Elevate the ribs during inhalation Origin Transverse processes of second through seventh cervical vertebrae (posterior tubercles) Insertion First rib Nerve C(3) 4-8 |
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Posterior Scalene |
Action Unilaterally: With the ribs fixed, laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Bilaterally: Elevate the ribs during inhalation Origin Transverse processes of sixth and seventh cervical vertebrae (posterior tubercles) Insertion Second rib Nerve C(3), 4-8 |
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Masseter |
Action Elevate the mandible (temporomandibular joint) May assist to protract the mandible Origin Zygomatic arch Insertion Angle and ramus of mandible Nerve Trigeminal (V) nerve (mandibular division) |
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Temporalis |
Action Elevate the mandible (temporomandibular joint) Retract the mandible Origin Temporal fossa and fascia Insertion Coronoid process and anterior edge of ramus of the mandible Nerve Trigeminal (V) nerve (mandibular division) |
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Suprahyoids |
Action Elevate the hyoid and tongue Depress the mandible (temporomandibular joint) Origin Geniohyoid, Mylohuoid: Underside of mandible Stylohyoid: Styloid process Insertion Hyoid bone Nerve Geniohyoid: C1, 2 Mylohyoid: Trigeminal (V) Stylohyoid: Facial (VII) |
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Digastric |
Action With hyoid bone fixed, depress the mandible (temporomandibular joint) With mandible fixed, elevate the hyoid bone Retract the mandible Origin Mastoid process (deep to sternocleidomastiod and splenius capitis) Insertion Inferior border of the mandible Nerve Anterior belly: Trigeminal (V) (mandibular division) Posterior belly: Facial (VII) |
