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26 Cards in this Set
- Front
- Back
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PECTORAL MUSCLES- SUPERFICIAL PECTORAL (2) DESCENDING PECTORAL TRANSVERSE PECTORAL |
ORIGIN: The first two sternebrae and usually a part of the third, fibrous raphe between adjacent muscles
INSERTION: The whole crest of the greater tubercle of the humerus
ACTION: To adduct the limb when it is not bearing weight or to prevent the limb from being abducted when bearing weight
INNERVATION: Cranial pectoral nerve |
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DEEP PECTORAL MUSCLE
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ORIGIN: The ventral part of the sternum and fibrous raphe between fellow muscles; the deep abdominal fascia in the region of the xiphoid cartilage
INSERTION: Majorty ison the lesser tubercule of the humerus;an aponeurosis to the greater tubercule and its crest; the caudal part ot the medial brachial fascia
ACTION: When the limb is advanced and fixed: to pull the trunk cranially and to extend the shoulder joint. When the limb is not supporting weight: to draw the limb caudally and flex the shoulder joint. To adduct the limb
INNERVATION: Caudal pectoral nerves |
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BRACHIOCEPHALICUS - Cleidobrachialis - Cleidocephalicus >> Pars mastoideus >> Pars cervicalis |
ATTACHMENTS: All attachments are movable but the clavicle or clavicular intersection is considered the origin. The cleidobrachialis attaches to the distal end of the cranial border of the humerus. The cervical part of the cleidocephalicus attaches to the cranial half of the mid-dorsal fibrous raphe and sometimes to the nuchal crest of the occipital bone. Its mastoid part attaches to the mastoid part of the temporal bone with the sternomastoideus muscle
ACTION: To advance the limb; to extend the shoulder joint and draw the neck and head to the side
INNERVATION: Accessory nerve and ventral branches of cervical spinal nerves |
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STERNOCEPHALICUS - pars mastoideus - pars occipitalus |
INSERTION: The mastoid part of the temporal bone and the nuchal crest of the occipital bone
ACTION: To draw the head and neck to the side
INNERVATION: Accessory nerve and ventral branches of cervical spinal nerves |
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STERNOTHYROIDEUS |
ORIGIN: The first costal cartilage
INSERTION: The caudolateral surface of the thyroid cartilage
ACTION: To draw the larynx and tongue caudally
INNERVATION: Ventral branches of cervical spinal nerves |
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STERNOHYOIDEUS |
ORIGIN: The first sternebra and the first costal cartilage
INSERTION: The basihyoid bone
ACTION: To pull the tongue and larynx caudally
INNERVATION: Ventral branches of cervical spinal nerves |
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OMOTRANSVERSARIUS |
ATTACHMENTS: The distal end of the spine of the scapula; cranially, the transverse wing of the atlas
ACTION: To advance the limb or flex the neck laterally
INNERVATION: Accessory nerve |
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TRAPEZIUS |
ORIGIN: The median raphe of the neck and the supraspinous ligament from the level of the third cervical vertebra to the level of the ninth thoracic vertebra
INSERTION: The spine of the scapula
ACTION: To elevate and abduct the forelimb
INNERVATION: Accessory nerve |
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RHOMBOIDEUS: - RHOMBOIDEUS CAPITIS - RHOMBOIDEUS CERVICIS - RHOMBOIDEUS THORACIS |
ORIGIN: The nuchal crest of the occipital bone; the median fibrous raphe of the neck; the spinous processes of the first seven thoracic vertebrae
INSERTION: The dorsal border and adjacent surfaces of the scapula
ACTION: To elevate the forelimb and draw the scapula against the trunk
INNERVATION: Ventral branches of cervical and thoracic spinal nerves |
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LATISSIMUS DORSI |
ORIGIN: The thoracolumbar fascia from the spinous processes of the lumbar and the last seven or eight thoracic vertebrae; a muscular attachment to the last two or three ribs
INSERTION: The teres major tuberosity of the humerus and the teres major tendon
ACTION: To draw the free limb caudally as in digging; to flex the shoulder joint
INNERVATION: Thoracodorsal nerve |
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SERRATUS VENTRALIS CERVICIS SERRATUS VENTRALIS THORACIS |
ORIGIN: The transverse processes of the last five cervical vertebrae and the first seven or eight ribs ventral to their middle
INSERTION: The dorsomedial third of the scapula (serrated face)
ACTION: To support the trunk and depress the scapula
INNERVATION: Ventral branches of cervical spinal nerves and the long thoracic nerve |
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DELTOIDEUS |
ORIGIN: The spine and acromial process of the scapula
INSERTION: The deltoid tuberosity
ACTION: to flex the shoulder
INNERVATION: Axillary nerve |
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INFRASPINATUS |
ORIGIN: The infraspinous fossa
INSERTION: A small, circumscribed area on the lateral side of the greater tubercule of the humerus.
ACTION: To extend or flex the joint depending on position of joint. To abduct the shoulder and to rotate the shoulder laterally. To prevent medial rotation when weight bearing and provide lateral stability to the shoulder joint
INNERVATION: Suprascapular nerve |
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TERES MINOR |
ORIGIN: The infraglenoid tubercule and distal third of the caudal border of the scapula
INSERTION: The teres minor tuberosity of the humerus
ACTION: To flex the shoulder, rotate the shoulder laterally, prevent medial rotation when bearing weight
INNERVATION: |
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SUPRASPINATUS |
ORIGIN: The supraspinous fossa
INSERTION: The greater tubercule of the humerus by a thick tendon
ACTION: To extend and stabalize the shoulder joint
INNERVATION: Suprascapular nerve |
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SUBTENDINOUS SYNOVIAL BURSA |
Located betweenthe tendon of insertion of the infraspinatus and the greater tubercleof the humerus. A bursa is a closed connective tissue sac containing synovial fluid, which reduces friction. |
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SUBSCAPULARIS |
ORIGIN: The subscapular fossa
INSERTION: The lesser tubercle of the humerus
ACTION: To adduct, extend, and medially stabilize the shoulder joint. To rotate the shoulder medially and prevent lateral rotation when bearing weight
INNERVATION: Subscapular nerve |
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TERES MAJOR |
ORIGIN:
INSERTION: The crest of the lesser tubercule of the humerus proximal to the teres major tuberosity
ACTION: To adduct, extend, and stabalize the shoulder joint
INNERVATION: Musculocutaneous nerve |
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TENSOR FASCIAE ANTEBRACHII |
ORIGIN: The fascia covering the lateral side of the latissimus dorsi
INSERTION: The olecranon
ACTION: To extend the elbow
INNERVATION: Radial nerve |
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TRICEPS BRACHII - LONG HEAD |
ORIGIN: The caudal border of the scapula
INSERTION: The olecranon tuber
ACTION: To extend the elbow and flex the shoulder
INNERVATION: Radial nerve |
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TRICEPS BRACHII - LATERAL HEAD |
ORIGIN: The tricipital line of the humerus
INSERTION: The olecranon tuber
ACTION: To extend the elbow
INNERVATION: Radial nerve |
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TRICEPS BRACHII - ACCESSORY HEAD |
ORIGIN: The neck of the humerus
INSERTION: The olecranon tuber
ACTION: To extend the elbow
INNERVATION: Radial nerve |
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TRICEPS BRACHII - MEDIAL HEAD |
ORIGIN: The crest of the lesser tubercle near the teres major tuberosity
INSERTION: The olecranon
ACTION: To extend the elbow
INNERVATION: Radial nerve |
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ANCONEUS |
ORIGIN: The lateral supracondylar crest and the lateral and medial epicondyles of the humerus
INSERTION: The lateral surface of the proximal end of the ulna (the olecranon)
ACTION: To extend the elbow
INNERVATION: Radial nerve |
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BICEPS BRACHII |
ORIGIN: The supraglenoid tubercule
INSERTION: The ulnar and radial tuberosities
ACTION: To flex the elbow and extend the shoulder
INNERVATION: Musculocutaneous nerve * Has only one head despite the "bi" in the name * There is also a biceps in the hindlimb, the biceps femoris |
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BRACHIALIS |
ORIGIN: The proximal third of the lateral surface of the humerus
INSERTION: The ulnar and radial tuberosities
ACTION: To flex the elbow
INNERVATION: Musculocutaneous nerve |
