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BIOL 319 - Lab 8

QuestionAnswer
Splenius - Action Extends/hyperextends head
Splenius - Origin Occipital and spines C7-T6
Splenius - Insertion Temporal, occipital, C2-4
Iliocostalis - Action Extends vertebral column
Iliocostalis - Origin Ribs 3-12
Iliocostalis - Insertion Angles of ribs, transverse processes C4-6
Semispinalis - Action Extends vertebral column and head
Semispinalis - Origin Transverse processes C7-T12
Semispinalis - Insertion Occipital bone, cervical spines and T1-T4 spines
External Intercostals - Action Elevates rib cage
External Intercostals - Origin Inferior border of rib above
External Intercostals - Insertion Superior border of rib below
Internal Intercostals - Action Depresses rib cage
Internal Intercostals - Origin Superior border of rib below
Internal Intercostals - Insertion Costal groove of rib above
Diaphragm - Action Increases intra-abdominal pressure
Diaphragm - Origin Inferior, internal rib cage and sternum; costal cartilages of last 6 ribs; lumbar vertebrae
Diaphragm - Insertion Central tendon
Rectus Abdominus - Action Flexes and rotates lumbar vertebral column
Rectus Abdominus - Origin Pubic crest
Rectus Abdominus - Insertion Xiphoid process; costal cartilages 5-7
Coccygeus - Action Supports pelvic viscera
Coccygeus - Origin Ischial spine
Coccygeus - Insertion Sacrum and coccyx
Sphincter Urethrae - Action Constricts urethra
Sphincter Urethrae - Origin Ischiopubic rami
Sphincter Urethrae - Insertion Midline raphe
Ischiocavernosus - Action Maintains erection
Ischiocavernosus - Origin Ischial tuberosities
Ischiocavernosus - Insertion Crus of corpus cavernosa of penis/clitoris
Serratus Anterior - Action Holds scapula to chest wall
Serratus Anterior - Origin Ribs 1-8
Serratus Anterior - Insertion Anteromedial scapula
Subscapularis - Action Medially rotates humerus
Subscapularis - Origin Subscapular fossa of spacula
Subscapularis - Insertion Lesser tubercle of humerus
Supraspinatus - Action Stabilizes shoulder joint
Supraspinatus - Origin Supraspinous fossa of scapula
Supraspinatus - Insertion Greater tubercle of humerus
Infraspinatus - Action Stabilizes shoulder joint; laterally rotates humerus
Infraspinatus - Origin Infraspinous fossa of scapula
Infraspinatus - Insertion Greater tubercle of humerus
Teres Minor - Action Stabilizes shoulder joint; laterally rotates humerus
Teres Minor - Origin Lateral border of scapula
Teres Minor - Insertion Greater tubercle of humerus
Teres Major - Action Extends, medially rotates, adducts humerus
Teres Major - Origin Inferior angle of scapula
Teres Major - Insertion Intertubercular groove of humerus
Coracobrachialis - Action Flexes, adducts humerus
Coracobrachialis - Origin Coracoid process of scapula
Coracobrachialis - Insertion Medial surface of humerus
Triceps brachii, medial head - Action Extends forearm
Triceps brachii, medial head - Origin Posterior humerus distal to radial groove
Triceps brachii, medial head - Insertion Olecranon process of ulna
Biceps brachii, long head - Action Flexes elbow, supinates forearm
Biceps brachii, long head - Origin Lip of glenoid cavity
Biceps brachii, long head - Insertion Radial tuberosity
Biceps brachii, short head - Action Flexes elbow, supinates forearm
Biceps brachii, short head - Origin Coracoid process of scapula
Biceps brachii, short head - Insertion Radial tuberosity
Brachialis - Action Flexes forearm
Brachialis - Origin Anterior distal humerus
Brachialis - Insertion Coronoid process of ulna
Flexor digitorum profundus - Action Flexes fingers
Flexor digitorum profundus - Origin Common flexor tendon
Flexor digitorum profundus - Insertion Distal phalanges 2-5
Supinator - Action Supinates forearm
Supinator - Origin Lateral epicondyle of humerus
Supinator - Insertion Proximal radius
Scalenes - Action Flexes, rotates neck
Scalenes - Origin Transverse processes C1-7
Scalenes - Insertion Anterolateral ribs 1 and 2
Rhomboideus - Action Retracts scapula
Rhomboideus - Origin Spines C7-T5
Rhomboideus - Insertion Medial border of scapula
Created by: apeoples13
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