Upper quarter dermatomes, myotomes, deep tendon reflexes, paresthesias and associated muscle weaknesses

Question 1

what nerve root dermatomes are included in the upper quarter?

Answer 1

C1-T12

Question 2

what nerve root myotomes are included in the upper quarter?

Answer 2

C2-T2

Question 3

what DTRs are included in the upper quarter?

Answer 3

C5-C7

Question 4

C1 dermatomal testing?

Answer 4

touch to vertex of skull

Question 5

C1 myotomal testing?

Answer 5

none?

Question 6

are there paresthesias or muscle weakness associated with the C1 nerve root?

Answer 6

no

Question 7

C2 dermatomal testing?

Answer 7

touch to forehead typically, temple, occiput

Question 8

C2 myotomal testing?

Answer 8

resisted cervical flexion

Question 9

C2 associated myotomal muscle weakness?

Answer 9

SCM
longus colli
rectus capitis

Question 10

what myotome is likely affected if a patient displays weakness with resisted cervical flexion? what muscles are likely involved?

Answer 10

C2-SCM, longus colli, rectus capitis

Question 11

C2 associated paresthesias?

Answer 11

none

Question 12

C3 dermatomal testing?

Answer 12

entire neck, posterior cheek, temporal area, prolongation forward under mandible

Question 13

C3 myotomal testing?

Answer 13

resisted, bilateral cervical lateral flexion

Question 14

C3 associated myotomal muscle weakness?

Answer 14

trapezius
splenius capitis

Question 15

what myotome is likely affected if a patient displays weakness with resisted cervical lateral flexion? what muscles are likely affected?

Answer 15

C3- trapezius, splenius capitis

Question 16

C3 associated paresthesias?

Answer 16

cheek, side of neck

Question 17

C4 dermatomal testing?

Answer 17

touch to shoulder area typically, clavicular area, upper scapular area

Question 18

C4 myotomal testing?

Answer 18

resisted bilateral shoulder elevation

Question 19

C4 associated myotomal muscle weakness?

Answer 19

trapezius, levator scapulae

Question 20

what myotome is likely affected if a patient presents with weakness with resisted, bilateral shoulder/scapular elevation? what muscles are likely affected?

Answer 20

C4- trapezius, levator scapulae

Question 21

C4 associated paresthesias?

Answer 21

horizontal band along the clavicle and upper scapula

Question 22

C5 dermatomal testing?

Answer 22

deltoid area, anterior aspect of entire arm to base of thumb

Question 23

C5 myotomal testing?

Answer 23

resisted, bilateral shoulder abduction

Question 24

C5 associated myotomal muscle weakness?

Answer 24

supraspinatus, infraspinatus, deltoid, biceps

Question 25

what myotome is likely affected if a patient presents with weakness with resisted bilateral shoulder abduction? what muscles are likely involved?

Answer 25

C5- supraspinatus, infraspintaus, deltoid, biceps

Question 26

C5 associated reflex?

Answer 26

biceps brachioradialis

Question 27

C5 associated paresthesias?

Answer 27

none

Question 28

C6 dermatomal testing?

Answer 28

anterior arm, radial side of hand to thumb* and index finger

Question 29

C6 myotomal testing?

Answer 29

resisted, bilateral elbow flexion and wrist extension

Question 30

C6 associated myotomal muscle weakness?

Answer 30

biceps, supinator, wrist extensors

Question 31

what myotome is likely affected if a patient presents with weakness with resisted bilateral elbow flexion and wrist extension? what muscles are likely involved?

Answer 31

C6- biceps, supinator, wrist extensors

Question 32

C6 associated reflex?

Answer 32

biceps, brachioradialis

Question 33

C6 associated paresthesias?

Answer 33

thumb and index finger

Question 34

C7 dermatomal testing?

Answer 34

touch to lateral arm and forearm to index, long and ring fingers

Question 35

C7 myotomal testing?

Answer 35

resisted, bilateral elbow extension and wrist flexion

Question 36

C7 associated myotomal muscle weakness?

Answer 36

triceps wrist flexors

Question 37

what myotome is likely affected if a patient presents with weakness with resisted, bilateral elbow extension and wrist flexion? what muscles are likely affected?

Answer 37

C7-triceps, wrist flexors

Question 38

C7 associated reflex?

Answer 38

triceps

Question 39

C7 associated paresthesias?

Answer 39

index, long and ring fingers

Question 40

C8 dermatomal testing?

Answer 40

touch to medial arm and forearm to long, ring and little fingers

Question 41

C8 myotomal testing?

Answer 41

resisted, bilateral thumb extension

Question 42

C8 associated myotomal muscle weakness?

Answer 42

ulnar deviators, thumb extensors, finger flexors

Question 43

what myotome is likely affected if a patient presents with weakness with resisted, bilateral thumb extension? what muscles are likely affected?

Answer 43

ulnar deviators, thumb extensors and finger flexors

Question 44

C8 associated paresthesias?

Answer 44

little finger alone or with two adjacent fingers; not ring or long fingers, alone or together (C7)

Question 45

T1 dermatomal testing?

Answer 45

medial side of forearm to base of little finger

Question 46

T2 dermatomal testing

Answer 46

touch to medial side of upper arm to medial side of elbow, pectoral and midscapular areas

Question 47

do disk lesions at the upper two thoracic levels (T1-T2) give rise to myotomal weakness?

Answer 47

no

Question 48

weakness of the intrinsic muscles of the hand is typically due to __ __ as opposed to upper thoracic disk lesions affecting the nerve root

Answer 48

other pathology (thoracic outlet, neoplasm of lung, ulnar nerve lesion)

Question 49

T3-T6 dermatomal testing?

Answer 49

upper thorax

Question 50

T5-T7 dermatomal testing?

Answer 50

costal margin

Question 51

T8-T12 dermatomal testing?

Answer 51

abdomen and lumbar region

Question 52

do disk lesions to T3-T12 typically give rise to myotomal weakness?

Answer 52

weakness is not typically detectable

Question 53

disk lesions to T3-T12 commonly result in __ signs, __ signs and __ pain

Answer 53

articular, dural, root

Question 54

root __ are rare with disk lesions to T3-T12 and have such indefinite area that they have little localizing value

Answer 54

signs (cutaneous analgeisa)

Question 55

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the vertex of the skull?

Answer 55

C1

Question 56

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to forehead, temple and/or occiput?

Answer 56

C2

Question 57

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the entire neck, posterior cheek, temporal area and/or prolongation forward under mandible?

Answer 57

C3

Question 58

what nerve root is likely affected if paresthesias are present on the cheeks and/or side of the neck along with dermatomal and myotomal invovlement?

Answer 58

C3

Question 59

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the shoulder area, clavicular area and/or upper scapular area?

Answer 59

C4

Question 60

what nerve root is likely affected if paresthesias are present along a horizontal band along the clavicle and upper scapula and there is dermatomal and myotomal invovlement?

Answer 60

C4

Question 61

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the deltoid area and anterior aspect of entire arm to the base of the thumb?

Answer 61

C5

Question 62

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the anterior arm and/or radial side of the hand to thumb and index finger?

Answer 62

C6

Question 63

what nerve root is likely affected if paresthesias are present in the thumb and index fingers along with dermatomal and myotomal invovlement?

Answer 63

C6

Question 64

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the lateral arm and forearm to the index, long and ring fingers?

Answer 64

C7

Question 65

what nerve root is likely affected if paresthesias are present in the index, long and ring fingers along with dermatomal and myotomal invovlement?

Answer 65

C7

Question 66

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the medial arm and forearm to the long, ring and little fingers?

Answer 66

C8

Question 67

what nerve root is likely affected if paresthesias are present in little finger alone or with two adjacent fingers along with dermatomal and myotomal invovlement?

Answer 67

C8

Question 68

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the medial side of the forearm to the base of the little fingers?

Answer 68

T1

Question 69

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the medial side of the upper arm to medial elbow and pectoral and midscapular areas?

Answer 69

T2

Question 70

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the upper thorax?

Answer 70

T3-T6

Question 71

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the costal margin?

Answer 71

T5-T7

Question 72

what dermatome is likely affected if sensation is impaired/absent with assessment of touch to the abdomen and lumbar region?

Answer 72

T8-T12