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24 Cards in this Set
- Front
- Back
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What is the floor of the PCT? |
- scalenes - levator scapula - splenius capitis |
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What splits the PCT into two portions? |
The omyhyoid muscle |
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Review contents of triangle |
... |
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What innervates the SCM? |
- spinal accessory nerve for motor - APR C2-4 for pain/proprioception |
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What is the action of SCM? |
- uni lateral: ipsilateral flexion, contralateral rotation - bilateral: extend atlanto-occpital joint - flexes cervical vertabra (chin to sternum) - extends sup. cervical while flexing inferior cervical |
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What is the origin and insertion of the omohyoid muscle? |
O: hyoid bone I: superior border of scapula, medial to suprascapular notch |
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What fascia invests the omohyoid bone? |
pretracheal fascia |
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What innervates omohyoid? |
APR C1-C3 of ansa cervicalis |
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What is the origin of anterior scalene? |
C3-C6 anterior tubercle |
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What is the origin of posterior scalene? |
C4-C6 posterior tubercle |
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What is the origin of middle scalene? |
C2-C7 posterior tubercle |
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What inserts here? |
middle scalene |
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What inserts here? |
posterior scalene |
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What inserts here? |
anterior scalene |
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What is the innervation of the scalenes? |
- anterior: APR C4-C6 - middle: APR C3-C8 - posterior: APR C6-C8 |
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When is the subclavian artery posterior to the anterior scalene? |
- the second part - costocervical trunk; deep cervical, superior intercostal |
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Label from top right around. |
- great auricular - transverse cervical - supraclavicular C3-C5 - lesser occipital C2C3 |
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Apex of the ear is supplied by cranial nerve 9, what supplies the rest of it? |
great auricular |
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What forms the external jugular vein? |
posterior auricular vein + retromandibular vein (posterior division) |
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The supraclavicular nerve (APR C3-C5) has three branches, each branch crosses something different, what do they cross? |
- medial: cross SCM - intermediate: cross clavicle - lateral: cross trapezius |
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What two nerves pierce the middle scalene? |
- dorsal scapular nerve C4, C5 - long thoracic nerve C5,C6,C7 |
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What nerve lies on top of anterior scalene |
phrenic nerve C3-C5 |
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What are the contents of the PCT? |
- supraclavicular nerve - lesser occipital - greater auricular - transverse cervical - dorsal scapular - spinal accessory - phrenic and accessory phrenic - suprascauplar nerve - BP - omohyoid muscle -subclavian artery and veins - external jugular vein |
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What is Erb's palsy? |
- injury of the suprascapular nerve from fractures of the clavicle - results in loss of lateral rotation of humerus - wasting of deltoid - waiters tip |
