Muscle Study Guide

Superficial pectoral m.

O: sternum

I: greater tubercle

A: adduct thoracic limb

Deep pectoral m.

O: sternum

I: greater and lesser tubercles of humerus

A: adduct thoracic limb and pull caudally

Brachiocephalicus m.

O: clavicular intersection

I: humerus, skull, neck

A: pull thoracic limb cranially and/or depress/pull head and neck laterally

Omotransversarius m.

O: wing of atlas

I: distal spine of scapula

A: pull thoracic limb cranially and/or depress/pull head and neck laterally

Trapezius m.

O: CERVICAL = dorsal neck

THORACIC = dorsal thorax
I: spine of scapula
A: elevate the thoracic limb

Rhomboideus m.

O: ———

I: dorsal border of scapula
A: elevate thoracic limb

Serratus ventralis m.

O: cervical vertebrae, thoracic wall
I: serrated face of scapula
A: support and/or elevate trunk

Latissimus dorsi m.

O: thoracolumbar fascia
I: ——-
A: draw thoracic limb caudally. Flex or extend humeral jt.

Which muscles are part of the extrinsic mm. of the neck?

Superficial pectoral, deep pectoral, brachiocephalicus, omotransversarius, trapezius, rhomboideus, serratus ventralis, latissimus dorsi

Which muscles are part of the mm. of the ventral neck?

Sternocephalicus, sternohyoideus, sternothyroideus

Sternocephalicus m.

O: sternum
I: skull
A: depress head and neck. draw head and neck laterally

Sternohyoideus m.

O: sternum
I: basihyoid bone
A: pull tongue and larynx caudally

Sternothyroideus m.

O: cranial aspect of sternum
I: thyroid cartilage
A: pull tongue and larynx caudally

Which muscles are part of the lateral mm. of the shoulder?

Deltoideus, supraspinatus, infraspinatus, teres minor

Which muscles are part of the medial mm. of the shoulder?

Subscapularis, teres major, coracobrachialis

Which muscles are part of the cranial mm. of the brachium?

Biceps brachii and brachialis

Which muscles are part of the caudal m. of the brachium?

triceps brachii (long, medial, lateral, accessory heads), tensor fasciae antebrachii, anconeus

Which muscles are part of the craniolateral antibrachial mm?

extensor carpi radialis, common digital extensor, lateral digital extensor, ulnaris lateralis, supinator, abductor pollicis longus, brachioradialis

Which muscles are part of the caudomedial antebrachial mm?

flexor carpi radialis, flexor carpi ulnaris, superficial digital flexor, deep digital flexor, pronator teres, pronator quadratus

Which muscles are part of the muscles of the manus?

Interosseous mm.

Deltoideus m.

O: spine of scapula and acromion
I: deltoid tuberosity (humerus)
A: flex humeral jt.

Supraspinatus m.

O: supraspinous fossa (scapula)
I: greater tubercle (humerus)
A: extend humeral jt.

Infraspinatus m.

O: infraspinous fossa (scapula)
I: greater tubercle (humerus)
A: flex humeral jt. abduct limb at humeral jt.

Teres minor m.

O: caudal border (scapula)
I: ——-
A: flex humeral jt.

Subscapularis m.

O: subscapular fossa (scapula)
I: lesser tubercle (humerus)
A: adduct limb at humeral jt.

Teres major m.

O: caudal border (scapula)
I: ———
A: flex humeral jt.

Coracobrachialis m.

O: coracoid process (scapula)
I: lesser tubercle (humerus)
A: adduct limb @ shoulder

Biceps brachii m.

O: supraglenoid tubercle
I: ——-
A: flex cubital jt and extend humeral jt.

Brachialis m.

O: ———
I: ———-
A: flex cubital jt.

Triceps brachii m. (long, medial, lateral, accessory heads)

O: LONG = caudal border (scapula)

OTHER = proximal humerus
I: olecranon
A: LONG = flex humeral jt.

ALL = extend cubital jt.

Extensor carpi radialis m.

O: lateral epicondyle of humerus
I: 2nd/3rd metacarpals
A: extend carpal jt.

Common digital extensor m.

O: lateral epicondyle of humerus
I: distal phalanges
A: extend carpal and digital jts.

Lateral digital extensor m.

O: lateral epicondyle of humerus
I: distal phalanges of lateral digit(s)
A: extend carpal and digital jts. of the lateral most digits

Ulnaris lateralis m.

O: lateral epicondyle of humerus
I: accessory carpal and 5th metacarpal bone
A: flex carpal jts. abduct manus

Supinator m.

O: lateral epicondyle of humerus
I: radius
A: supination of manus

Abductor pollicis longus m.

O: ———
I: ———
A: abduct 1st digit

Flexor carpi radialis m.

O: medial epicondyle of humerus
I: metacarpals 2 & 3
A: flex carpal jts.

Flexor carpi ulnaris m.

O: medial epicondyle
I: accessory carpal
A: flex carpals

Superficial digital flexor m.

O: medial epicondyle
I: middle phalanges
A: flex carpal, metacarpophalangeal, proximal interphalangeal jts.

Deep digital flexor m.

O: medial epicondyle
I: distal phalanges
A: flex carpal and digital jts.

Pronator teres m.

O: medial epicondyle
I: radius
A: pronation of manus

Pronator quadratus

O: ——
I: ——-
A: pronation of the manus