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18 Cards in this Set
- Front
- Back
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Name the 7 extrinsic muscles of the forelimb. |
-Brachiocephalicus -Trapezius -Omotransversarius -Latissimus dorsi -Rhomboideus -Serratus ventralis -Pectoralis (deep and superficial) |
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From the 7 extrinsic muscles, name the 3 main PROTRACTORS of the limb. |
-Braciocephalicus (3 parts: cleidomastoideus & cleidocervicalis - together called clediocephalicus; and cleidobrachialis) -Trapezius -Omotransversarius |
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From the 7 extrinsic muscles, name the 4 main RETRACTORS of the limb. |
-Latissimus dorsi -Rhomboideus -Serratus ventralis -Deep pectoral |
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From the 7 extrinsic muscles, name the 3 main PROTRACTORS of the limb, and the nerves that innervate them. |
-Braciocephalicus - 3 parts: --Cleidomastoideus & cleidocervicalis - together called clediocephalicus - CERVICAL NN. & ACCESSORY N. --Cleidobrachialis - AXILLARY N. -Trapezius - ACCESSORY N. -Omotransversarius - ACCESSORY N. |
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What are the 3 parts of the BRACHIOCEPHALIC muscle? |
Three parts divided by the vestigial clavicle (in the dog, this is just a bit of fibrous cartilage): 1 - Cleidomastoideus - from the head to the clavicle 2 - Cleidocervicalis - from the neck to the clavicle 3 - Cleidobrachialis - from the clavicle to the humerus |
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From the 7 extrinsic muscles, name the 4 main RETRACTORS of the limb, and the nerves that innervate them. |
-Latissimus dorsi - DORSAL THORACIC NN. -Rhomboideus - CERVICAL & THORACIC NN. -Serratus ventralis - CERVICAL NN & LONG THORACIC N. -Deep pectoral - mainly CAUDAL PECTORAL N. |
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Name the 2 main elevators of the limb. |
-Rhomboideus -Trapezius |
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Name the 2 main depressors of the limb. |
-Serratus ventralis -Pectorals |
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Which are the 4 main extrinsic forelimb muscles that support the trunk? |
-Serratis ventralis -Rhomboideus -Trapezius -Deep pectoral |
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Which extrinsic forelimb muscle has an anti-abduction function i.e. prevents the limb from splaying laterally under gravity? And what nerve innervates this muscle? |
Superficial pectoral - mainly CRANIAL PECTORAL N. (Rhomboid and deep pectoral muscles may also play a role in anti-abduction) |
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Which 2 extrinsic forelimb muscles cross the shoulder joint? And what functions can they then have on this joint? |
Braciocephalicus - secondary shoulder extensor Latissimus dorsi - secondary shoulder flexor |
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List origin, insertion, action and nerve for this muscle |
O: thoracolumbar fascia I: teres tuberosity of humerus A: retraction of the limb (also secondary flexor of shoulder joint) N: dorsal thoracic nn. |
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List origin, insertion, action and nerve for this muscle |
O: clavicular intersection I: dorsal median raphe of neck (cleidocervicalis) and mastoid of skull (cleidomastoideus); cranial aspect of distal humerus (cleidobrachialis) A: protraction of the limb (also secondary extensor of shoulder joint) N: cervical nn. and accessory n. (cleidocephalicus); axillary n. (cleidobrachialis) |
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List origin, insertion, action and nerve for this muscle |
O: distal scapular spine I: wing of atlas (C1) A: protraction of the limb N: accessory n. |
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List origin, insertion, action and nerve for this muscle |
O: dorsal median raphe (C3 to T9) I: spine of scapula A: protraction of limb N: accessory n. |
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List origin, insertion, action and nerve for this muscle |
Rhomboideus divided into 3 heads: strap-like capitis, broader cervicis and short thoracis. O: nuchal crest of occiput (capitis); dorsal mediam raphe of neck and spinous processes of T1-T3 (cervicis); spinous processes of T4-T6/7 (thoracis) I: dorsal border of scapula A: retraction of limb N: cervical and thoracic nn. |
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List origin, insertion, action and nerve for this muscle |
O: transverse processes of C3-C7 (cervical part); ventral halves of ribs 1-7/8 (thoracic part) I: serrated face of scapula A: retraction/depression of limb; support of trunk N: cervical nn. and long thoracic n. |
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List origin, insertion, action and nerve for this muscle |
O: sternum and median raphe I: lesser and greater tubercles of humerus, and media brachial fascia A: retraction of limb N: caudal pectoral nn. |
