superficial back muscles: O,I,NS,A,BS
serratus anterior A:
Action: terminal protraction, anti-winging
serratus anterior blood supply:
Blood supply: lateral thoracic artery
trapezius muscle- nerve supply
CN XI, spinal accessory nerve
trapezius muscle- origin
EOP (external occipital protuberance), superior nuchal line, ligamentum nuchae, spines of C7 and thoracic vertebra.
serratus anterior I:
I: anterior medial border of scapula
Latissimus Dorsi muscle- Origin
Iliac crest, thoracolumbar fascia, spines of T7-12, Inferioir angle of scapula, 3-4 lower ribs
latissimus Dorsi muscle- Insertion
Medial to bicepital groove of humerus
serratus anterior nerve:
Nerve: long thoracic N.
serratus anterior O:
O: upper 8-9 ribs
Latissimus Dorsi muscle- Nerve supply (CSD)
Thoracodorsal N. (c6,7,8- post. cord of brachial plexus)
subclavian artery
Thyrocervical trunk (sublavian artery)
teres major muscle- action
adducts. extends and medially (internally) rotation of arm.
triangle of Ausculation
boundaries- trap, lat, med. scap, rhomboid maj. muscles significance- hear sounds of respiration
teres major muscle- blood supply
circumflex scapular artery (of subscapular artery)
ligamentum nuchae
connects the trapezius to C7 up to EOP
trapezius muscle- lower action
depression, retraction, upward rotation of scapula
levator scapula muscle- blood supply
dorsal scapular artery- branch of subcalvian artery
rhomboid major muscle- blood supply
dorsal scapular artery- branch of subclavian artery
rhomboid minor muscle- blood supply
dorsal scapular artery- branch of subclavian artery
levator scapula muscle- nerve supply
dorsal scapular nerve (C5-C5 root)
rhomboid major muscle- nerve supply
dorsal scapular nerve (C5-C5 root)
rhomboid minor muscle- nerve supply
dorsal scapular nerve (C5-C5 root)
trapezius muscle- upper action
elavation of scapula
trapezius muscle- middle action
elevation, upward rotation, adduct/retract scapula
Latissimus dorsi muscle- Action
extends, adducts, medially rotates arm (internally)
Axillary artery
is a continuation of subclavian artery as it passes superior to the first rib, ends just inferior to the teres major muscle.
Lumbar triangle
key point to check for a lumbar hernia
trapezius muscle- Insertion
lateral clavical, acromion and scapular spine
branches of axillary artery
lateral thoracic artery (serratus anterior muscle)
Teres major muscle- Origin
lower segment of lateral border of scapula
posterior cord of brachial plexus
lower subscapular N. (C5,C6) upper subscapular N. (C5,C6) thoracodorsal N. (C6,C7,C8)
teres major muscle- nerve supply
lower subscapular nerve (C5,C6- posterior cord of brachial plexus)
teres major muscle- Insertion
medial bicipital groove of humerus
rhomboid major muscle- insertion
medial border of scapula at infraspinous fossa
rhomboid minor muscle- insertion
medial border of scapula at spine
rhomboid minor muscle- action
pulls scapula medially & raises medial border of scapula
rhomboid major muscle- action
pulls scapula medially and raises medial border of scapula
levator scapula muscle- action
raises scapula at medial border
dorsal rami of t7-t12 spinal N.
skin over the latissimus dorsi muscle and thoracolumbar fascia.
dorsal rami of c4-t6 spinal N.
skin over the trapezius M.
dorsal rami of l1-l3 spinal nerves
skin superior to iliac crest (thoracolumbar fascia)
rhomboid minor muscle- origin
spines of C7- T1 vertebra
Rhomboid major muscle- origin
spines of thoracic vertebra
Quadrangular space
structures- axillary N. and posterior circumflex humeral artery
triangular space
structures- circumflex scapular artery (of subscapular artery)
tricep hiatus
structures- deep artery of arm (profunda brachii artery of brachial artery) radial nerve (C5, C6, C7, C8, T1 - posterior cord of brachial plexus)
dorsal scapular artery
subclavian artery- rhomboid major and minor muscles and levator scapulae muscle
levator scapula muscle- instertion
superomedial border of scapula
suprascapular artery
supraspinatus muscel and infraspinatus muscle
latissimus dorsi muscle- blood supply
thoracodorsal artery (continuation of subscapular artery)
trapezius muscle- blood supply
transverse cervical artery
levator scapula muscle- origin
transverse processes of C1-4 vertebra