Anatomy Review

Tell me the rule of 9

perineum 1%, head and neck 9%, arms + forearm + hands 18%, trunk 36%, thigh leg feet 36%

neural tube

early embryonic structure that develops into the central nervous system.

Circles around neural tube giving rise to muscles, bones, and other CT

somites

Dermatomes

skin areas associated with a spinal nerve level

Myotomes

muscle groups associated with a spinal nerve level

Which vertebra has no cutaneous dermatome

C1

Which pathway are dermatomes part of

afferent

Which dermatomes are mainly found in the upper limbs

C5 to T1

Which dermatomes are mainly found in lower limbs

L3 to S1

Myotome pathway

efferent (motor)

What degree does the scapula sit internally rotated

30 to 40 degrees

what ribs does the scapula lie over

2 through 7

Spine of scapula is at which vertebra

T3/4

What bones is the shoulder girdle comprised of

clavicle, scapula, and manubrium

Whats the shoulder complex made of

GHJ and girdle

What does anterior SC joint limit

retraction

What does the posterior SC joint limit

protraction

What does the interclavicular ligament limit

everything except depression

What does the costoclavicular lig limit

everything except depression

What does acromioclavicular lig limit

posterior tilt and IR

What's the coracoclavicular joint limit

extension, IR, abd, and posterior clavicle rotation

Whats the coracoacromial lig limit

superior migration of humoral head

What does coracohumoral lig limit

inferior translation and ER of humeral head

Overall, GH joint ligaments mainly limit

anterior/inferior translation and ER.

Superior glenohumeral ligament limits

external rotation with the arm by the side and helps resist anterior + inferior translation

Middle glenohumeral ligament limits

anterior translation of the humeral head and external rotation

Inferior glenohumeral ligament limits

inferior translation, especially when the arm is abducted, and also limits external rotation

4 Contents of axilla

axillary artery and vein, lymph nodes, and brachial plexus

Know the quadrangular space and triangular space

draw it

Whats in quadrangular space

posterior humoral circumflex artery and axillary nerve

Whats in triangular space

circumflex scapular artery

Draw the brachial plexus

good job

What are the Supraclavicular parts of the brachial plexus

roots and trunks

What are the brachial plexus cords in reference to

the axillary artery

Draw cutaneous innervation of arm and hand posterior and anterior

medial and lateral cutaneous n of forearm, radial n, ulnar n, median n