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7 Cards in this Set
- Front
- Back
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Trapezius
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Origin:
Cervical part- median fibrous raphe of 3rd-7th cervical vertebrae Thoracic part- from supraspinous ligament and dorsal spines of 1st-9th thoracic vertebrae Insertion: Scapular Spine Nerve Supply: Dorsal branch of Cranial Nerve XI/Accessory Nerve Action: elevate and draw limb forward |
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Serratus ventralis
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Origin:
Cervical Part: Transverse processes of the last 3 cervical vertebrae Thoracic Part: Later surface of the 1st eight ribs. Insertion: Serrated face of scapula Nerve Supply: Cervical part- ventral branches of the last 3 cervical spinal nerves Thoracic part- long thoracic nerve of brachial plexus Action: passive support of trunk, thoracic part helps inspiration, moves scapula forward and backward |
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Omotransversarius
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Origin: wing of atlas
Insertion: lower spine of scapula Nerve supply: CN XI/Accessory Nerve Action: draws scapula forward |
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Rhomboideus
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Has 3 parts!
Origin: Rhomboideus capitis- occipital bone of skull Rhomboideus cervical part- tendinous raphe of neck from 3-7 cervical vertebrae and spines of 1-3 thoracic vertebrae Rhomboideus thoracic part: spines 4-6 of thoracic vertebrae Nerve supply: ventral branches of 3-7 cervical and 1-6 thoracic spinal nerves Action: elevate the limb, move scapula forward, backward and close to the trunk |
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Latissimus dorsi
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Origin: from thoracodorsal fascia via an aponeurosis and lateral surface of last 2-3 ribs
Insertion: Teres tubercle on the medial shaft of the humerus Nerve supply: thoracodorsal nerve from the brachial plexus Action: draw limb backwards and flex shoulder joint |
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Brachiocephalicus
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Has 3 parts: Cleidobrachialis, cleidocervicalis, cleidomastoideus
Attachments: distal part of humeral crest to the cranial half of the cervical fibrous raphe and to the mastoid part of the skull Nerve supply: Cleidobrachialis- nerve from brachial plexus Cleidocephalicus- ventral branches of several cervical nerves and CN XI Action: draw limb forward, flex neck, turn neck |
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Pectoral muscles
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Superficial pectoral
Origin: From 1st 2 sternebrae and associated costal cartilages Insertion: Crest of the major tubercle of the humerus Nerve Supply: Cranial pectoral nerve Action: adduction of limb Deep pectoral Origin: from all sternebrae Insertion: Greater and lesser tubercles of humerus Nerve supply: caudal pectoral nerves Action: adduction of limb, draws limb backwards |
