Thoracic Limb Flashcards
(37 cards)
Deep Pectoral
(O) Ventral part of the sternum
(I) Lesser tubercle of the humerus, and through aponeurosis to greater tubercle and its crest, also medial brachial fascia.
(A) Adduct limb. Pull trunk cranially. Extend shoulder joint.
Superficial Pectoral
Descending & Transverse:
originate on the sternebrae and insert on the crest of the greater tubercle of the humerus.
(A) Adduct limb, when not bearing weight. Prevent limb from being abducted when bearing weight.
Brachiocephalicus
Cleidobrachialis & Cleidocephalicus: divided by clavicular intersection
Cleidobrachialis
(O) Clavicular intersection
(i) distal end of the cranial border of humerus
(A) Advance limb, extend shoulder joint, draw head and neck to the side
Cleidocephalicus
Pars Mastoideous, Pars Cervicalis
(O) Clavicular intersection
(I) Mastoid process, dorsal midline of the neck
(A) Advance the limb, extend the shoulder joint, draw the neck and head to the side.
Sternocephalicus
Mastoid part, Occipital part
(O) Sternum (first sternebra)
(I) Mastoid process, nuchal crest of occipital bone
(A) Draw the head and neck to the side
Sternohyoideus
(O) first sternebra and first costal cartilage
(I) basihyoid bone
(A) Pulls tongue and larynx caudal
Sternothyroideus
(O) First costal cartilage
(I) Caudolateral surface of the thyroid cartilage
(A) pulls tongue and larynx caudal
Omotransversarius
Attachment: Spine of the scapula (distal end), transverse wing of the atlas
Action: advance the limb and flex the neck laterally
Superficial Cervical Lymph Nodes
found near/under Omotransversarius
Trapezius
Cervical & Thoracic Parts
(O) Median raphe of neck and supraspinous ligament from 3C vertebra through 9T vertebra
(I) Spine of scapula
(A) Elevate/Abduct Forelimb
Rhomboideus- (3)
Capitis, Cervicalis, Thoracis
(O) Nuchal crest, median raphe neck, spinous processes of first 7T vertebrae.
(I) Dorsal border of scapula
(A) Elevate forelimb, draw scapula against trunk
Latissimus Dorsi
(O)Thoracolumbar fascia from spinous processes of the lumbar and last 7/8T vertebrae, muscular attach. to last 2/3 ribs
(I)Teres Major tuberosity of humerus and the teres major tendon
(A) Draw limb caudal. (dig) Flex shoulder joint.
Serratus Ventralis
Cervicis & Thoracis Parts
(O) Transverse process of last 5C vertebrae and first 7/8 ribs ventral to middle
(I) Serrated face of scapula
(A) Support trunk and depress the scapula
Deltoideus
(O) Spine and acromial process of scapula
(I) Deltoid tuberosity
(A) Flex shoulder
Infraspinatus
(O) Infraspinous fossa
(I) Lateral side of greater tubercle of humerus
(A) extend and laterally stabilize/flex shoulder. abduct shoulder/rotate laterally. Prevent medial rotation and provide lateral stability when weight bearing.
Teres Minor
(O) Infraglenoid Tubercle and caudal border of scapula
(I) Teres Minor tuberosity of humerus
(A) Flex shoulder joint, rotate shoulder laterally, prevent medial rotation when bearing weight
Supraspinatus
(O) supraspinous fossa
(I) greater tubercle of humerus-thick tendon
(A) extend and laterally stabilize shoulder joint
Subscapularis
(O) Subscapular fossa
(I) lesser tubercle of humerus
(A) adduct, extend/medially stabilize shoulder joint. rotate shoulder medially & prevent lateral rotation when bearing weight
Teres Major
(O) Caudal angle/caudal border of scapula & subscapularis
(I) Teres Major tuberosity of humerus
(A) flex shoulder, rotate shoulder medially, prevent lateral rotation when bearing weight
Coracobrachialis
(O) Corocoid process of scapula
(I) crest of lesser tubercle of humerus, prox. to teres major tuberosity
(A) adduct/extend/stabilize shoulder joint
Tensor Fasciae Antebrachii
(O) Fasciae covering lateral side of latissimus dorsi
(I) olecranon
(A) extend elbow
Triceps Brachii
Long, (Lateral, Medial, Acessory)
(O) scapula (O) proximal end of the humerus
(I) olecranon tuber
(A) extend elbow
Anconeus
(O) lateral supracondylar crest & lateral/medial epicondyles humerus
(I) lateral surface of proximal end of ulna (olecranon)
(A) extend elbow
