anatomy of mini 1

cn 11

thoracodorsal nerve (tdn)

dorsoscapular nerve (dsn)

dorsoscapular nerve

dorsoscapular nerve

medial nuchal line, ext occipital protuberance, nuchal ligament, spinous process of C7-T12

spinous process of T7-T12, thoracolumbar fascia, iliac crest, last 3-4 ribs

transverse process of C1-C4

spinous process of T2-T5

nuchal ligament, spinous process of C7-T1

clavicle, acromion and spine of scapula

intertubercular groove of humerus

medial border of scapula

medial border of scapula

elevate, retract and rotate scapula superiorly

extend, adduct, medially rotate humerus

elevatescapula and rotates inferiorly

• retract scapula and rotates it inferiorly
• fix scapula to thoracic wall

• o-nuchal ligament, spinous process of C7-T3
• i-superior border of ribs 2-4
• n- intercostal nerves (T1-4/T2-5)
• a- proprioception/ elevates ribs during forced inhalation

• o- spinous process of T11-L2
• i- inferior border of ribs 8/9-12
• n- intercostal nerves (T9-12)
• a- proprioception/ depresses ribs during forced exhalation

• o- nuchal ligament, spinous process of C7-T3/4
• i- (cap) mastoid process of temporal bone, laterla 1/3 of the nuchal line
• (cer) transverse process of C1-3/4
• n- POSTERIOR rami of spinal nerves
• a- (alone) lateral flexion of head, (together) extension of head and neck

• l-'intermediate muscles of the back'
• m-iliocostalis, longissimus, spinalis
• i- DORSAL rami of spinal nerves

POSTERIOR rami of spinal nerves

• Glenohumeral (sup, mid, inf) anterior
• Coracoacromial- prevents superior displacement
• Tranverse humeral- makes canal with IT sulcus for the long head bicep tendon

• subscapularis- protects subscapular tendon
• subacromial- protects supraspinatus tendon

• i- axillary nerve (C5,6)
• a- abduction after initial 15, stabalization of GH joint
• (alone) flexion and extension of arm
• o- clavicle, acromion and spine of scapua
• i- deltoid tuberosity

• i- lower subscapular
• a- adduction and medial rotation, stabalizes humeral head in glenoid cavity
• o- inferior angle of scapula
• i- medial lip of IT sulcus

• RCM
• i- suprascapular n
• a- adduction initial 15, stabalize GH joint
• o- supraspinatus fossa
• i- greater tubercle (sf)

• RCM
• i- suprascapular n
• a-lateral rotation and adduct humerus(with teres minor), stabalize GH joint
• o- infraspinatus fossa
• i-greater tubercle (mf)
• test- lateral rotation with elbow flexed

• RCM
• i-axillary n
• a- lateral rotation and adducts humerus(with infraspinatus), stabalize GH joint
• o-interior angle of scapula
• i- greater tubercle (if)
• test- lateral rotation of arm with elbow flexed

• i- upper and lower subscapular n
• a- medial rotation and adduction of humerus, stabalize GH joint
• o-subscapular fossa
• i- lesser tubercle
• test- lift dorsum of hand off back

• Ca deposits in supraspinatus tendon cause subacromial bursitis
• pain during 50-130 ABduction

circumflex scapular a

• teres minor l
• csa o head of triceps
• teresmajor n
• g

• radial n, deep brachial artery(profundus)= *
• teres major
• l l
• o * a heads of triceps
• n t.
• g

• axillary n, posterior circumflex humeral artery= *
• teres minor
• l l
• o * a heads of tricep
• ng t.
• teres major

• lack of sympathetic outflow to the region of th eye, causing ptosis, meiosis, anophthalmosis and anhydrosis
• drooping of the eyelid, contstriction of th pupil, sagging of the eye and no sweat areas of the face

excessive SNS output to vessels of the fingers and toes causing blanching of the skin due to lack of blood flow

circumflex scapular a, deep transverse cervical a and suprascapular a

T1-2

T3, 4, 5

L1,2

• n- medial and lateral perctoral
• a- tog-add and medial rotate scap, draw scap anteroinferiorly
• clav head- flex humerus
• sternocostal head-extend hum from flexed position
• o- clavicle sternum and superior 6 costal carltilages
• i- lateral lip of IT sulcus

• n- medial pectoral n
• a- stabalize scap(draw anteroinferiorly against thoracic wall
• o- ribs 3-5 near costal cartliges
• i- coracoid process

• n- long thoracic n (C5,6,7)
• a-PROTRACT scap, rotates scap
• o-lateral portion of ribs 1-8
• i-anterior surface of medial border of scapula

• n-nerve to subclavius (C5-6)
• a-anchors and depresses clavicle
• o-junction of R1 and its costal cartlige
• i-inferior surface of medial 1/3 of clavicle

• - C1 fracture from something being dropped on head
• - Vertebral a. damage more likely that spinal cord

• - C2 fracture
• - spinal cord damage likely

• - symphysis joint with vertebral body
• - none at skull-//-C1-//-C2, saccrum or coccyx

supraspinous-interspinous- ligamentum flavum- (vetebral canal)- posterior longitudinal- (vert body)- anterior longitudinal(whiplash victim)

• - post ext-post int-ant int-(vert body)-ant ext
• - valveless, which is opportunistic for metastasis

only ligamentous tissue involved

microscopic tearing of muscle fibers

hypothalmus and brain stem

SNS- T1-L2(lateral horn), short pre-, long post-, diffuse reaction

• PNS- C3,7,9,10 and S2-S4(lateral horn), long pre-, short post-, discrete reaction
• - no PNS fibers in body wall or limbs

fusion of sympathetic chain gang at coccyx

• connect anterior ramus to sympathetic chain gang
• white- entrance chain gang(myelinated fibers)
• gray- exit chain gang(unmyelinated fibers)

only one rami(gray) T1 and below L2, because there are no symp fibers entering the chain gang above and below these levels, only exiting

• vasomotor- vasculature
• sudomotor- sweat glands
• pilomotor- hair follicles

• sympathetic fiber entrance into cranium
• around internal carotid artery