Anatomyprosection1sthalf[1]

Anatomyprosection1sthalf[1] - 1 Anatomy Lab Review General...

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1 Anatomy Lab Review General 72 questions total 10 X-rays 10 bones Mostly straightforward ID Some secondary questions When looking at a specimen, first orient yourself 1 st ask yourself if it an anterior view or posterior view Then determine if you’re at the medial and lateral side of the body Be sure to look to see if you’re looking at a male or female You have one minute per question Take the 1 st 10 seconds to orient yourself, then ID the structure Back and Shoulder Occipital n., C2 A purely cutaneous nerve Suboccipital n. A motor nerve, lying deeper in the triangle Trapezius m. Attaches at the level of T12 Nerve: spinal component of the spinal accessory n., CN XI , seen on the anterior aspect of the trapezius m. This nerve also innervates the sternocleidomastoid m. Blood: superficial branch of the transverse cervical a. Action: elevate, retract and rotate the scapula Abducts above 90 degrees Lesion: can’t elevate (shrug) shoulder These 3 muscles have the same nerve and blood supply Levator scapulae m. Attaches C1-C4 Rhomboid minor m. , comes off opposite the spine of the scapula, T3 Attaches C7-T1 Rhomboid major m. Attaches T2-T5 Rhomboids let you “stick your chest out” Nerve: dorsal scapular n. Seen on the anterior aspect of the scapula Blood: deep branch of the transverse cervical a. Accompanies the nerve to these muscles Serratus posterior superior m. , lies under the rhomboids Latissimus dorsi m. Inserts into the floor of the intertubercular groove Action: “hand-cuff position” Nerve: thoracodorsal n. from the posterior cord of the brachial plexus Serratus posterior inferior m. , lies under the latissimus dorsi Erector spinae m. Spinalis m. , closest to the spine Longissimus m. , in the middle, goes all the way to the mastoid process Iliocostalis m. , most lateral, from iliac crest to the ribs Rotator cuff muscles , SITS Supraspinatus m. Infraspinatus m. Teres minor m. Subscapularis m. Supraspinatus m. Action: 1 st 15 degrees abduction Nerve: suprascapular n. Runs below the suprascapular ligament , which is suspended over the suprascapular notch Blood: suprascapular a. Runs above the suprascapular ligament , which is suspended over the suprascapular notch Suprascapular a. arises most commonly from the 1 st part of the subclavian a. , or occasionally from the 2 nd or 3 rd part “A rmy over the bridge, N avy under the bridge” A rtery runs above the suprascapular ligament N erve runs below the suprascapular ligament Attaches on the highest facet of the greater tuberosity of the humerus Injury of supraspinatus m. Inserts under the acromion, thus it is the most commonly torn in a rotator cuff injury The tendon passes under the acromion. One can develop bony spurs on the under side of the acromion, which will start to tear away the tendon, until eventually the tendon ruptures Loss the first 15 degrees of abduction, so person will hang the shoulder down to let gravity allow them to overcome the
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Anatomyprosection1sthalf[1] - 1 Anatomy Lab Review General...

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