Back muscles MSK

Levator scapulae and rhomboids innervation

dorsal scapular n

Lat dorsi innervation

thoracodorsal n

trapezium

11 cn, accessory

supraspinatus and infraspinatus innervation

suprascapular n

teres minor and infraspinatus common action

lat rotation

teres major and lat dorsi common action

adduction, med rotation, extension

teres minor innervation

axillary n

pec major innervation, action

medial and lateral pectoral nerve, action is adduction, med rotation, flexion

serratus anterior action, innervation

abduction of scapula, long thoracic n

Splenius capitis and cervicis bilateral and unilateral action

bilateral contraction - extends head and neck, unilateral contraction rotates head to same side and laterally flexes

errector spinae muscles

I LOVE SPINE bilateral contraction - extends trunk, unilateral contraction - laterally flexes trunk

Transversospinalis

Triangle of auscultation borders Boundaries:

• Medial – trapezius

• Lateral – med border

of scapula

• Inferior – Latissimus

dorsi

lymphatic drainage of the back

Skin – mainly posterior axillary and superficial inguinal

Muscles – mainly paravertebral