study guide anatomy test 3

what is the inferolateral border of the suboccipital triangle

obliquus capitis inferior

what is the latero superior border of the suboccipital triangle

obliquus capitis superior

where is the rectus capitis posterior minor located in the suboccipital triangle

superior and medial

rectus capitis posterior major location in suboccipital triangle

superior to obliquus capitis inferior, inferior to rectus capitis posterior minor

contents of suboccipital triangle

vertebral artery

suboccipital nerve (dorsal ramus C1)

no sensory component (no dorsal root)

motor to suboccipital muscles

prox attach of rectus capitis posterior major

spinous process of C2 (axis)

dist attachment of rectus capitis posterior major

lateral inferior nuchal line of occipital bone

action of rectus capitis posterior major

extends head, rotates face to same side

rectus capitis posterior major innervation

dorsal ramus C1 (spinal nerve); suboccipital

rectus capitis posterior minor prox attach

posterior tubercle of C1 (atlas)

rectus capitis posterior minor distal attach

medial inferior nuchal line of occipital bone

rectus capitis posterior minor action

extends head

rectus capitis posterior minor innervation

dorsal rami C1; suboccipital nerve

obliquus capitis superior prox attach

transverse process of C1 (atlas)

obliquus capitis superior distal attach

between lateral aspect of superior and inferior nuchal lines of occipital bone

obliquus capitis superior action

extends head

obliquus capitis superior innervation

dorsal ramus C1; suboccipital n

obliquus capitis inferior prox attach

spinous process of C2 (atlas)

obliquus capitis inferior distal attachment

transverse process of C1 (atlas)

obliquus capitis inferior action

rotates face to same side

obliquus capitis inferior innervation

suboccipital n; dorsal rami C1

spinotransverse group

splenius capitis and cervicis

action of spinotransverse group

rotate vertebral column ipsilaterally

innervation of spinotransverse group

lateral branches of dorsal rami of middle and lower nerves

erector spinae muscle group

spinalis, longissimus, iliocostalis

action of erector spinae muscle group

extends vertebral column

innervation of intrinsic back muscles

dorsal primary rami

transversospinalis muscle group

semispinalis, multifidus, rotatores

action of transversospinales

rotate VC contralaterally

interspinales muscle group action

postural muscles, aid in extension of VC

intertransversarii muscles action

lateral flexion of VC

what is the medial border of the triangle of auscultation

the lateal border of the inferior part of the trapezius

lateral border of the triangle of ausculation

the vertebral border of the scapula

the inferior border ot the triangle of auscultation

the superior border of latissimus dorsi

floor of the triangle of ausculation

intercostal space 6, no overlying muscles

general function of fascia

help transmit muscle contraction to bone

large proprioceptive properties

can produce pain

provides structural support to deep tissues, muscles, organs

TLF

in lower lumbar

helps hold everything together

tight Thoracolumbar fascia

musculocutaneous nerve roots

C5-7

the musculocutaneous branch arises from what cord

lateral cord

the axillary nerve arises from what cord

posterior

the radial nerve arises from what cord

posterior

the median nerve arises from what cords

lateral and medial

the ulnar nerve arises from what cord

medial cord

how are the cords of the brachial plexus named

by relation to axillary artery

what roots contribute to lateral cord of brachial plexus

C5, C6

what roots contribute to posterior cord of brachial plexus

C5-T1

what roots contribute to medial cord of brachial plexus

C8, T1

radial nerve palsy

wrist drop

extensor m are not able to extend fingers and wrist

peripheral nerve injury w/ crutch walking

radial nerve

affects forearm extensors, posterior compartment of brachium

axillary nerve lesion

caused by: fracture of surgical neck of humerus, downward dislocation of shoulder joint

compression from incorrect use of crutches

musculocutaneous injuries

weak flexion at shoulder joint

weak supination supinator (radial nerve)

sensory loss along the lateral side of the forearm (lateral cutaneous nerve of forearm)

ulnar nerve lesion at elbow

fractures of medial epicondyle

motor paralysis

affects flexor carpi ulnaris, medial 1/2 of flexor digitorum profundus, adductor pollicis

sensory loss over anterior and posterior surfaces of palm, and medial 1 & 1/2 finger

deltopectoral triangle

bordered by pec major, deltoid, clavicle

passageway for cephalic vein

supraspinatus prox attach

supraspinatus fossa

supraspinatus distal attach

greater tubercle of humerus

supraspinatus action

abduction, assists w/ lateral rotation

supraspinatus innervation

suprascapular n C5-C6

infraspinatus prox attach

infraspinatus fossa

infraspinatus distal attach

greater tubercle of humerus

infraspinatus action

lateral rotation, horizontal abduction

infraspinatus innervation

suprascapular n C5-C6

teres minor prox attach

posterior, lateral border of scapula

teres minor action

lateral rotation, horizontal abduction

teres minor innervation

axillary n C5-C6

subscapularis prox attach

entire anterior surface of scapula

subscapularis distal attach

lesser tubercle of humerus

subscapularis action

medial rotation

subscapularis innervation

subscapular n C5-C6

serratus anterior prox attach

medial 1/2 of clavicle

external surface of lateral 1-8 ribs

anterior layer of rectus sheath

serratus anterior distal attach

anterior surface of medial border of scapula

serratus anterior action

abduction (protration) of scapula

serratus anterior innervation

long thoracic nerve C5-7

which muscle is also known as the boxers muscle

serratus anterior

pec major clavicular head prox attach

medial 2/3 clavicle

what is distal attachment for all 3 heads of pectoralis major muscle

lateral aspect of humerus below head

pec major clavicular head action

flexion, horizontal adduction, medial rotation of humerus

pec major clavicular head innervation

lateral pectoral nerve C5-C6

pec major sternal head prox attach

anterior sternum and cartilage of 1st 6 ribs

pec major sternal head action

extension, adduction, horizontal adduction, medial rotation

pec major sternal head innervation

medial pectoral n C8-T1

pec major abd head prox attach

anterior layer of rectus sheath

pec major abd head action

assists repiration when shoulder girdle is fixed

pec major abd head innervation

lateral pectoral n C8-T1

coracobrachialis prox attach

coracoid process of scapula

coracobrachialis distal attachment

medial anterior humerus

coracobrachialis action

flexion, adduction, horizontal adduction

coracobrachialis innervation

musculuocutaneous n C5-C7

deltoid prox attach

outer 1/3 of clavicle top of acromion, scapular spin

distal attachment deltoid

deltoid tuberosity

deltoid anterior head action

flexion, horizontal adduction, medial rotation

deltoid innervation

axillary n C5-C6

deltoid middle head action

abduction, horizontal abduction

deltoid posterior head action

extension, horizontal abduction, lateral rotation

pec minor prox attach

outer surface of upper margin of 3-5 rib

pec minor distal attach

coracoid process of scapula

pec minor action

lowers lateral angle, pulls shoulder forward

pec minor innervation

medial pectoral n C8-T1

teres major prox attach

lower angle, lateral dorsal scapula

teres major distal attach

anterio-medial humerus

teres major action

extension, adduction, medial rotation