Muscles & Nerves of the Forelimb (Broken Down)

Please excuse any typos, I was trying to make this fast

Where does the cleidocervicalis originate?

Clavicular Intersection

Where does the cleidocervicalis insert?

Neck

Where does the cleidooccipitalis originate?

Clavicular Intersection

Where does the cleidooccipitalis insert?

Nuchal Crest or Median Raphae

What is the action of the cleidocephalic muscle (and its divisions)?

Draw the limb cranially and bilateral flexion of the neck

What nerve innervates the cleidocephalic muscle (and its divisions)?

Axillary Nerve

Which species is the Cleidocephalic muscle split into the cleidomastoid and the cleidocervical muscles?

Dog

Which species is the cleidocephalic muscle split into the cleidooccipital and cleidomastoid muscles?

Pig and Ox

Which species only has one belly of the cleidocephalic muscle which is the claidomastoid?

Horse

Where does the cleidomastoid originate?

Clavicular intersection

Where does the cleidomastoid insert?

Mastoid process of the temporal bone

What is the origin of the cleidobrachialis?

Distal 1/3 of the humerus

What is the insertion of the cleidobrachialis?

Clavicular intersection

What is the action of the cleidobrachialis?

Draw the limb cranially and bilateral flexion of the neck

Where does the trapezius pars capitis originate in carnivores and pigs?

Median raphae of the neck

Where does the trapezius pars capitis originate in ruminants and equids?

Nuchal Ligament

Where does the trapezius pars capitis insert?

Spine of the scapula via aponeurosis

What is the action of the trapezius?

Adbuction of the forelimb

What is the trapezius innervated by?

Accessory Nerve

Where does the trapezius pars thoracica originate?

Supraspinous ligament

Where does the trapezius pars thoracica insert?

Proximal 1/3 of the scapular spine

What is the action of the sternocephalicus?

Draw head and neck laterally

What innervates the sternocephalicus?

Accessory and Ventral branches of cervical spinal nerves

Where does the sternocephalicus originate?

Manubrium Sterni

Where does the sternocephalicus pars mastoideous insert?

Mastoid process of the Temporal Bone

Where does the sternocephalicus pars occipitalis insert?

Nuchal Crest

Where does the omotransversarius originate?

Distal end of scapular spine

Where does the omotransversarius insert?

Wings of Atlas and Transverse process of Axis

What is the action of the omotransversarius?

Lateral flexion of the head and neck; extend limb cranially

What innervates the omotransversaius?

Accessory Nerve

Where does the latissimus dorsi originate?

Medial aspect of thoracolumbar fascia

Where does the latissimus dorsi insert?

Teres Major tuberosity

What innervates the latissimus dorsi?

Thoracodorsal

Where does the pectoralis descendens originate?

First Sternebra

Where does the superficial pectoral insert?

Crest of Greater Tubercle

What is the action of the superficial pectoral muscle?

Adduct the forelimb

What innervates the superficial pectoral?

Cranial pectoral and branches from cervical nerves 7 and 8

Where does the pectoralis transversus originate?

First 2-3 Sternebra

Where does the deep pectoral originate?

Ventral part of sternum and median raphae

Where does the deep pectoral insert?

Lesser tubercle

What is the action of the deep pectoral?

Adduct the forelimb, pull trunk cranially, extend and flex the shoulder joint

What innervates the deep pectoral?

Caudal pectoral

Where does the rhomboideus pars capitis originate?

Nuchal Crest

Where does the rhomboideus pars cervicis originate?

Spinous process of cervical vertebrae; median raphae

Where does the rhomboideus pars thoracis originate?

Spinous process of T1-T7

Where does the rhomboideus insert?

Dorsomedial aspect of the scapula

What is the action of the rhomboideus?

Elevate the forelimb and draw the scapula towards the trunk

What innervates the rhomboideus?

Ventral branches of cervical and thoracic nerves

Where does the serratus ventralis pars thoracis originate?

Medial aspect of ribs 1-8

Where does the serratus ventralis pars cervicalis originate?

Transverse process of C3-C7

Where does the serratus ventralis insert?

Serrated face of scapula

What is the action of the serratus ventralis?

Support the trunk; draw/depress scapula to trunk

What innervates the thoracic part of the serratus ventralis?

Long Thoracic nerve

What innervates the cervical part of the serratus ventralis?

ventral branches of cervical spinal nerves

Where does the supraspinatus originate?

Supraspinous fossa

Where does the supraspinatus insert?

Greater tubercle of humerus by a thick tendon

What is the action of the supraspinatus?

Extend and stabilize the shoulder joint

What innervates the supraspinatus?

Suprascapular Nerve

Where does the infraspinatus originate?

Infraspinous fossa

Where does the infraspinatus insert?

lateral side of Greater Tubercle

What is the action of the infraspinatus?

Lateral rotation of the shoulder, extension/flexion of shoulder, prevents medial rotation when bearing weight

What innervates the infraspinatus?

Suprascapular Nerve

Where does the deltoideus pars scapularis originate?

Scapular Spine

Where does the deltoideus pars acromialis originate?

Acromion

Where does the deltoideus insert?

Deltoid Tuberosity

What is the action of the deltoideus?

Flex the shoulder

What innervates the deltoideus?

Axillary nerve

Where does the teres minor originate?

Infraglenoid tubercle and distal 1/3 of caudal border

Where does the teres minor insert?

Teres minor tuberosity

What is the action of the teres minor?

Flex shoulder, lateral rotation, prevent medial rotation when weight bearing

What innervates the teres minor?

Axillary Nerve

Where does the Teres major originate?

Caudal angle and border of the scapula, caudal surface of subscapularis

Where does the teres major insert?

Teres major tuberosity

What is the action of the teres major?

Flex shoulder, medial rotation, prevent lateral rotation when weight bearing

What innervates the teres major?

Axillary nerve

Where does the coracobrachialis originate?

Coracoid Process

Where does the coracobrachialis insert?

Crest of lesser tubercle (proximal to teres major tuberosity)

What is the action of the coracobrachialis?

Adduct, Extend, and stabilize the shoulder

What innervates the coracobrachialis?

Musculocutaneous

Where does the subscapularis originate?

Subscapular fossa

Where does the subscapularis insert?

Lesser tubercle

What is the action of the subscapularis?

Aid in extension, medial rotation, and adduction; provides medial stabilization of shoulder

What innervates the subscapularis?

Subscapular

Where does the tensor fasciae antibrachii originate?

lateral fascia of latissimus dorsi

Where does the tensor fasciae antebrachii insert?

Olecranon (after crossing distally)

What is the action of the tensor fasciae antebrachii?

Elbow and shoulder extension

What innervates the tensor fasciae antebrachii?

Radial nerve

Where does the brachialis originate?

Lateral aspect of proximal 1/3 of humerus

Where does the brachialis insert?

Ulnar and Radial tuberosity

What is the action of the brachialis?

Elbow flexion

What innervates the brachialis?

Musculocutaneous

Where does the biceps brachii originate?

Supraglenoid tubercle

Where does the biceps brachii insert?

Ulnar and radial tuberosities

What is the action of the biceps brachii?

Elbow flexion and shoulder extension

What innervates the biceps brachii?

Musculocutaneous

Where does the long head of the triceps brachii originate?

Caudal border of scapula

Where does the triceps brachii insert?

Olecranon

What special action does the long head of the triceps have?

Shoulder flexion

What is the action of the triceps brachii?

Elbow extension

What innervates the triceps brachii?

Radial Nerve