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12 Cards in this Set
- Front
- Back
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Posterior triangle boundaries (include roof & floor)
What divides it into occipital and subclavian triangles? |
SCM, trapezius muscle, clavicle
Roof: Skin, fascia, platysma Floor: splenius capitis, levator scapulae, scalenus medius, scalenus anterior
omohyoid muscle |
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Contents of posterior triangle |
branches of cervical plexus (C2-C4); accessory nerve (11th cranial nerve), external jugular vein, subclavian artery and vein, brachial plexus.
(Image) |
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Sternocleidomastoid |
Origin: Sternum, medial third clavicle insertion: MAstoid process Action: unilaterally - tilts head to side, rotation. Nerve: accessory 11th cranial nerve --> sensory info to C2 |
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Trapezius |
Origin: c7, all thoracic vertbrae. medial part of superior nuchal line, external occipital protuberance, ligamentum nuchae insertion: Action: Middle - braces shoulders. upper - raise shoulder tip, lower - pull medial scapula downwards. movement of shoulder and arms Nerve: motor - accessory nerve sensory c3,c4 |
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Digastric |
anterior - posterior belly joined by tendon. Origin: Anterior belly - lower border of Md (digastric fossa). Posterior - notch medial aspect mastoid process (digastric notch). Insertion: intermediate tendon superior border hyoid bone. Action: depression Md - open mouth. retrude Md. lift hyoid bone during swallow. Nerve: anterior - trigeminal (inferior alveolar). posterior - facial |
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Infrahyoid muscles |
omohyoid: superior belly - hyoid -->intermediate tendon deep to SCM. inferior - tendon --> lateral across posterior triangle --> scapula. sternohyoid: (superficial) sternum, hyoid bone Thyrohyoid: (deep) thyroid cartilage --> hyoid bone Sternothyroid: (deep) thyroid cartilage --> sternum |
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Larynx - describe. function. components |
upper airway. Speech. hyoid bone, thyroid cartilage, cricoid cartilage |
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Hyoid bone |
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thyroid cartilage |
Two Laminae that join anteriorly to form laryngeal prominence (adam's apple) |
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Cervical Fascia - structure - function - Layers |
s: connective tissue f: surrounds muscles, BVs, nerves. binding and allows sliding over each other. l: superficial - subcutis blending with reticular layer of dermis. areolar CT, adipose deep- dense fibrous. Investing: wraps SCM, trapezius. vertebral: wraps vertebra and vertbral muscles. Visceral: wraps the oesophagus and trachea. cranial heath: wraps common carotid, internal jugular vein, vagus nerve (10th). |
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splenius capitus |
o: Nuchal ligament and spinous process of C7-T3 I: mastoid process bs: aorta nn: Posterior ramus of spinal nerves C3and C4 a: Extend, rotate, and laterally flex the head |
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Scalenes |
O: Cervical vertebrae (CII-CVII) I: First and second ribs A: Ascending cervical artery N: Cervical nerves (C3-C6) Action: Elevation of first and second ribs |
