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Lab Practical 4
Origin and insertion of muscles
32
Anatomy
Undergraduate 3
07/06/2013

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Term
external intercostals
Definition
origin: inferior margins of ribs 1-11
insertion: superior margin of next lower rib
Term
external abdominal oblique
Definition
origin: ribs 5-12
insertion: anterior half of iliac crest; sympysis and superior margin of pubis
Term
internal abdominal oblique
Definition
origin: inguinal ligament; iliac crest; thoracolumbar fascia
insertion: ribs 10-12; costal cartilages 7-10; pubis
Term
rectus abdominis
Definition
origin: pubic symphysis and superior margin of pubis
insertion: Xiphoid process; costal cartilages 5-7
Term
transverse abdominal
Definition
origin: inguinal ligament; iliac crest;thoracolumbar fascia costal cartilages 7-12
insertion: linea alba; pubis; aponeurosis of internal oblique
Term
deltoid
Definition
origin: clavicle, acromion process, and scapular spine
insertion: deltoid tuberosity of the humerus
Term
infraspinatus
Definition
origin: infraspinous fossa
insertion: greater tubercle of humerus
Term
teres minor
Definition
origin: lateral border of scapula
insertion: greater tubercle of humerus
Term
teres major
Definition
origin: lateral border of scapula
insertion: crest of lesser tubercle of humerus
Term
pectoralis major
Definition
origin: clavicle, sternum, cartilages of ribs 1-7
insertion: crest of greater tubercle of humerus
Term
pectoralis minor
Definition
origin: ribs 3-5
insertion: coracoid process of scapula
Term
biceps brachii
Definition
origin: long head: supraglenoid tubercle short head: coracoid process of scapula
insertion: radial tuberosity
Term
brachialis
Definition
origin: anterior, distal surface of humerus
insertion: coronoid process of ulna
Term
brachioradialis
Definition
origin: lateral supracondylar ridge of humerus
insertion: styloid process of radius
Term
triceps brachii
Definition
origin: infraglenoid tuberosity of scapula, lateral and posterior surface of humerus
insertion: olecranon process of ulna
Term
flexor carpi ulnaris
Definition
origin: medial epicondyle of humerus and ulna
insertion: pisiform, hamate, and fifth metacarpal
Term
flexor carpi radialis
Definition
origin: medial epicondyle of humerus
insertion: second and third metacarpals
Term
palmaris longus
Definition
origin: medial epicondyle of humerus
insertion: palmar fascia
Term
extensor carpi radialis longus
Definition
origin: lateral supracondylar ridge of humerus
insertion: second metacarpal
Term
extensor carpi radialis brevis
Definition
origin: lateral epicondyle of humerus
insertion: third metacarpal
Term
extensor carpi ulnaris
Definition
origin: lateral epicondyle of humerus, proximal ulna
insertion: fifth metacarpal
Term
extensor digitorum
Definition
origin: lateral epicondyle of humerus
insertion: middle and distal phalanges of second through fifth digits
Term
abductor pollicis longus
Definition
origin: posterior radius and ulna, interosseous membrane
insertion: first metacarpal
Term
extensor digiti minimi
Definition
origin: lateral epicondyle of humerus
insertion: proximal phalanx V
Term
serratus anterior
Definition
origin: all or nearly all ribs
insertion: medial border of scapula
Term
trapezius
Definition
origin: external occipital protuberance; medial 1/3 of superior nuchal line; nuchal ligament; spinous processes of vertebrae C7-T3 or T4
insertion: acromion and spine of scapula; lateral 1/3 of clavicle
Term
rhomboideus major
Definition
origin: spinous processes of vertebrae T2-T5
insertion: medial border of scapula
Term
Rhomboideus minor
Definition
origin: spinous processes of vertebrae C7-T1; nuchal ligament
insertion: medial border of scapula
Term
Latissiumus Dorsi
Definition
origin: vertebrae T7-L5; lower three of four ribs; iliac crest; thoracolumbar fascia
insertion: floor intertubercular sulcus of humerus
Term
spinalis
Definition
origin: spinous processes
insertion: spinous processes
Term
longissimus
Definition
origin: transverse processes
insertion: transverse processes
Term
iliocostalis
Definition
origin: ilium and ribs
insertion: ribs or transverse processes
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