OIA n. human anatomy exam1

Trap

O- SNL, EOP, SP C7-T12

I- lat 1/3 clav, acromion, spine of scap

A- decending= depression

mid= retraction, helps A and D

accending= elevation

n.- CN 11: accessory

lat

O- SP T6-12, thoracolumbar fascia, posterior illiac crest

I- medial crest of intertubecular sulcus

A-extension, med rot, ADDuction

n.- thoracodorsal n. C6,7,8

levator scap

O- TP posterior tub C1-4

I- Medial boarder of scap above spine

A- elevation, rotation of glenoid fossa inferiorly'

n.= dorsal scap n. C5

rhomboid M and mi

O- M SP T2-5

mi nucal lig, SP C7-T1

I- M medial boarder of scap at spine to inferior angle

mi medial end of spine of scap

A- retraction, rotate glenoid fossa inferiorly

n.- dorsal scap n. C5

serratus posterior superior

O- SP C7-T3, nuchal lig

I- rib angles 8-12

A- rib depression, exhalation

n.- ventral ramii T9-T12

serratus posterior inferior

O- SP T11-L2

I- Ribs angle 8-12

A- rib depression, exhalation

n.- ventral ramii T9-T12

Splenus capitis

O-  nuchal ligament, SP C7-T6

I- mastoid process, lat ⅓ of SNL

A- bilateral head and neck extension

    Unilateral ipis side bend/ rot

n. -dorsal ramii 

splenus cervicus

O- nuchal ligament, SP-T6 same

I- TP of C1-3

A-bilateral head and neck extension

              Unilateral ipis side bend/ rot

n.- dorsal ramii

semispinalis

4-6 segments, longest 

TP-SP

A- extend head, or contralateral rotate head or part of region

n.- dorsal ramii

Multifidus

Shorter: 2-4 segments

TP- SP

A- extension, contralateral rot, side bending, stabilization

n.- dorsal ramii

Rotatores

brevis= 1, longus=2

TP-SP

A- maybe controlateral rot, maybe bilate extension, maybe stabilize

proprioceptive organ to tell muscles to activate*

n.- dorsal ramii

Interspinalis

O-Muscles between each SP

A- Extend local area, some rotation

*the ligaments prevent them from going too far appart

*the muscles bring the spine back together

Intertransversai

TP to TP

A- lateral side bending or stabilization

Levator costorum

Brevis

Between segments

TP to rib below

longus

Crosses a segment

TP. skips rib to a lower rib

Helps inhalation

Rectus capitis post minor

O: posterior tubercle of C1

I: medial inferior nuchal line

n.: C1 nerve root suboccipital n.

Rectus capitis post major

O: SP C2 

I: lateral aspect of inferior nuchal line

n.: C1 nerve root Suboccipital n.

Obliquus capitis sup

O: TP C1

I: between nuchal lines (*bottom half of space)

n.: C1 nerve root Suboccipital n.

Obliquus capitis inf

O: SP C2

I: TP C1

n.: C1 nerve root Suboccipital n.

Deltoid

O- lateral ⅓ of clavicle, acromion, spine of scap

I- deltoid tuberosity of humerus

A- ant= clavicular part

FLX and med rot

    Middle= acromial part

ABDuction

    post=  spinal part

EXT and lat rot

n.-  axillary n. C5, 6

Supraspinatus

O- supraspinous fossa

I- superior facet of greater tubercle of humerus

A- initiates ABDuction (0-15 degrees)

*taken over by acromial part of delt

n.- suprascapular n. C5, 6

Infraspinatus

O- infraspinus fossa

I- middle facet of greater tubercle of humerus

A- lateral rotation of the arm

n.- suprascapular n. C5,6

teres minor

O- middle part of lateral border of scapular

I- inferior facet of greater tubercle of humerus

A- lateral rotation of the arm, minorly

n.- axillary n. C5,6

Subscapulatus

O- subscapular fossa (entire anterior part of scap)

I- lesser tubercle of humerus

A- medial rotation, adduction of brachium

Helps hold humeral head into socket

n.- 2!!

Upper subscapular n. C5,6

Lower subscapular n.  C5,6

Teres major

O- posterior surface of inferior angle of scap

I- medial crest of intertubecular groove

*lat!

A- ADDuction, Medial rot

*similar to lat!!!!!! No extension tho

n.- lower subscapular n. C5,6

Serratus anterior

O- external lateral aspects of ribs 1-8

I- anterior medial border of scapula

A- protracts scapula, rotates scapula UP, holds scap tight to thoracic wall

n. - long thoracic n. C5,6,7

Pectoralis major

O- anteromedial clavicle, anterior sternum, superior 6 costal cartilages aponeurosis of external oblique muscles

I- anterior/lateral crest of intertubecular groove

A- powerful ADDuctor, medial rotation of brachium

n. - lateral pectoral n. C5,6,7

  Medial pectoral n. C8, T1

Calvicular = c5-6

Just lateral

Sterno = C7,8, T1

Both

pec minor

O- anterior surface of ribs 3-5

Right by costal cartilage

I- medial superior aspect of coracoid process of scapula

A- stabilize scapula when we reach forward

Draws it inferiorly and anteriorly

scapular setting

n. - medial pectoral n C8-T1 ONLY

Subclavius

O- junction of rib 1 and costal cartilage

I- inferior aspect of middle ⅓ of clavicle

Subclavian groove

A- depresses and anchors clavicle

n. - “nerve to subclavius” C5,6