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21 Cards in this Set
- Front
- Back
sternocleidomastoid muscle: origin
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sternum and clavicle
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sternocleidomastoid muscle: insertion
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mastoid process
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boundaries of the posterior triangle
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anterior - posterior border of sternocleidomastoid m
posterior - anterior border of trapezius inferior - middle 1/3 of clavicle |
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the inferior belly divides the posterior triangle into 2 smaller triangles :
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subclavian triangle
occipital triangle |
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subclavian triangle boundaries
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inferior belly of omohyoid
SCM middle 1/3 of clavicle |
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superficial cervical fascia contais:
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cutaneous nerves, blood vessels, and lymphatic vessels
superficial lymph nodes fat and connective tissue elements platysma muscle |
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innervation of platysma muscle
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cervical branch of CN VII
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carotid sheath contents:
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vagus nerve - posterior
common and internal carotid a - medial internal jugular v |
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splenius capitis m origin and insertion
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origin - ligamentum nuchae and spinous process of C7-T3
insertion - occipital bone and mastoid process |
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levator scapulae m origin and insertion
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origin - transverse process of C2-C4
insertion - superior medial angle of scapula |
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posterior scalene m origin and insertion
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origin - transverse process of C4-C6
insertion - 2nd rib |
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middle/anterior scalene m origin and insertion
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origin - transverse process of C4-C6
insertion - 1st rib |
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cervical plexus: level of origin
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Ventral rami of C2, C3, C4 - contributions from C1 and C5
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Lesser occipital
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C2 - sometimes C3
sensory supplies skin of neck and scap posteriosuperior to the auricle |
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Great auricular
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C2, C3
sensory travels superiomedially across SCM supplies skin inferior to auricle, over parotid gland and posterior part of the auricle |
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Transverse cervical
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C2, C3
sensory goes across SCM supplies skin over anterior triangle |
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Supraclavicular nerve
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C3, C4
sensory divides into medial, intermediate, and lateral branches supplies skin over clavicle and the superior wall of the chest and anteriolateral part of the shoulder |
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Ansa cervicalis
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C1, C2, C3
motor Superior ramus - C1, C2 inferior ramus - C2, C3 |
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phrenic nerve
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C3, C4, C5
motor supply to diaphragm damage causes paralysis to 1/2 the diaphragm sensory to central part of diaphragm |
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branches of the inferior ramus of the ansa cervicalis
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sternohyoid
sternothyroid superior and inferior bellies of omohyoid |
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spinal accessory never (CN XI)
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motor supply to the trapezius and SCM
courses obliquely across the posterior triangle dividing it into two equal halves |