Ch Dermatomes -Anatomy - Landmarks

Front 1

dermatomes of the arms by the thumb?

Back 1

C5, C6 & C7

Anterior C5

Lateral: C6

Posterior: C7

(Lateral)

Front 2

dermatomes of the arms by the pinky?

Back 2

T1 & C8

Anterior: T1

Posterior: C8

(medial)

Front 3

Dermatomes for the posterior arm

Back 3

C7 & C8

C7 = Posterior (thumb), lateral

C8=posterior arm (pinky) medial

Front 4

Dermatomes for the anterior arm

Back 4

C5 & T1

C5= anterior l (Thumb)

T1= anterior (pinky)

Front 5

Dermatomes for the posterior leg

Back 5

S1 & S2

S1= posterior lateral (little toe)

S2=posterior medial (big toe)

Front 6

Dermatomes for the anterior leg

Back 6

(Big toe to little toe) L1, L2,

L3,L4, L5, S1

Front 7

Dermatomes for the arm

Back 7

C5-T1

C5, C6, C7, C8,T1

Front 8

Dermatomes for the plantar surface of the foot

Back 8

Medial to lateral

L4, S2, L5, S1

L4 = medial malleolus

S2 = medial heel to the instep of foot

L5= The lateral part of the 1st toe to the 4th toe

S1= lateral side of foot & pinky toe

Front 9

Dermatome most lateral on arm?

Back 9

C6

Radial side

Front 10

dermatome
hand

Back 10

dermatome C6, C7, C8

Front 11

S1

Back 11

Sacral area to

lateral part of gluts to

lateral part of posterior legs

to lateral malleolus to lateral margin of foot and little toe

Front 12

L5

Back 12

Starts right above the sacrum, down the lateral hips

to the lateral legs to the front of the leg

under the knee to the

Medial great toe, 2 , 3 & 4 toes and

heel

Front 13

dermatome
ant & interior surfaces of lower limbs

Back 13

dermatome L1, L2, L3, L4, L5

Front 14

thumb

Back 14

C6

Front 15

dermatome foot

Back 15

L4, L5, S1,S2

Front 16

Circles around the anus

Back 16

S5, S4, S3

Front 17

dermatome S1,2, L5

Back 17

Posterior legs (S1= posterior lateral, S2= posterior medial)

S1- starts sacral area down posterior leg, to lateral malleolus to pinky toe of foot

L5= posterior: lateral part of heel & lateral side of great toe to 4th toe

& iliac area of back above the sacrum & glut fold)

Laterally to

anterior: under knee to feet- lateral side of great toe to 4th toe

Front 18

dermatome L4

Back 18

Lower thigh to

knee cap to

medial malleolus
medial side of great toe

Front 19

dermatome C8, T1

Back 19

dermatome
upper limbs by the pinky

T1 Anterior medial

C8 Posterior medial

Front 20

dermatome T4

Back 20

dermatome
nipple level

Front 21

dermatome C5

Back 21

Anterior: Under the clavicles

Anterior Lateral part of upper extremities

Posterioraly: lower neck to clavicular area

Front 22

T10

Back 22

Belly button Umbilicus

(Xiphisternal notch/jn
Esophageal hiatus)

Front 23

dermatome S1

Back 23

-posterior, lateral surfaces of the lower limbs (little toe)

-lateral margin of the foot and little toe

Front 24

C7

Back 24

-1st two fingers

-medial part of hand

-Posterior lateral part of upper limbs (goes from the back by elbow to dorsum of the hand to fingers)

Front 25

C8

Back 25

- Posterior Medial sides of upper limbs to

-ring & pinky fingers to medial hands

Front 26

C4

Back 26

Low collar shirt

Anteriorally: low neck, right above the clavicles

Posteriorally: neck

(Hyoid bone, bifurcation of carotid)

Front 27

anus

Back 27

S5

Front 28

Pictures of the dermatomes of the legs and feet

Back 28

Front 29

T1

Back 29

Right after C5, the clavicles anteriorally

Posteriorally: Medial part of anterior arm

Front 30

C5

Back 30

Anterior: clavicles

Lateral part of anterior arm

Posterioraly: back of the neck to clavicles

(Thyroid cartilage, feel carotid pulse)

Front 31

Pictures of the dermatomes of the back and the posterior arms

Back 31

Front 32

Pictures of the dermatomes of the anterior arms

Back 32

Front 33

T1

Back 33

Anterior: under C5,

Medial upper extremities

Posterioraly: starts at armpits to back

Front 34

C6

Back 34

-Thumb

-lateral part of the upper limbs to the thumb

(Cricoid cartilage, start trachea)

Front 35

dermatome C5,6,7

Back 35

lat parts of upper limb (thumb)

C5 anterior lateral

C6 lateral

C7 Posterior lateral

Front 36

L4

Back 36

-from the lateral lower thigh, to the

knee cap towards the

medial malleolus to

- Great toe

NO Iliac crests (supracristal plane)
Bifurc of aorta

Front 37

S2

Back 37

Sacral to buttocks

to medial posterior legs

medial heels to metatarsal of 1st toe

End of dural sac, dura, arachnoid, subarachnoid space, CSF

Front 38

S3

Back 38

End of sigmoid colon

Front 39

L1/L2

Back 39

END OF ADULT SPINAL CORD

Transpyloric plane (halfway b/t xiph jn and umbil, or halfway b/t suprastern notch and pubic symph)

Front 40

nerves T1-L2

Back 40

Sympathetic nervous system spinal levels

Front 41

dermatome C2

Back 41

dermatome
top, posterior skull

Front 42

dermatome perineum

Back 42

S2, S3, S4

Front 43

dermatome T10

Back 43

dermatome
umbilicus level

Front 44

dermatome C3,C4

Back 44

dermatome
neck

Front 45

dermatome C8

Back 45

dermatome
ring and little fingers

Front 46

T7

Back 46

Great vessels enter/leave heart
Inferior tip of scapulae

Front 47

dermatome T12, L1

Back 47

dermatome
groin/inguinal region

Front 48

L2/L3

Back 48

Renal arteries
Subcostal plane

Front 49

T12

Back 49

Aortic hiatus
Celiac artery (just below)
Upper pole of L kidney

Front 50

dermatome
lateral margin of foot and little toe

Back 50

dermatome S1

(little toe)

Front 51

inferior boarders of lungs

Back 51

T6, T8, T10

Front 52

T12-L1

Back 52

Duodenum

Front 53

T2

Back 53

Suprasternal notch, upper aortic arch

Front 54

nerve C10

Back 54

Vagus nerve (passes anterior to root of lung)

Front 55

T5-7

Back 55

pulmonary hilum

Front 56

L3

Back 56

IMA
Umbilicus (T10 Spinal nerve)

Front 57

L1-2

Back 57

Lumbar splanchnic (Renal)

Front 58

T11-12

Back 58

Least splanchnic (IMA)

Front 59

T6/7

Back 59

3rd rib/costal cartilage

Front 60

T4/5

Back 60

Bifurc of trachea
Sternal angle (of Louis)
Aortic arch
Sup/Inf mediastinal jn
2nd rib/costal cartilage

Front 61

nerve C5-8, T1

Back 61

Brachial plexus

Front 62

T8

Back 62

Hiatus of IVC

Front 63

L1

Back 63

SMA
Upper pole of R kidney

Front 64

nerve C3-5

Back 64

Phrenic nerve

Front 65

T5-T9

Back 65

Greater splanchnic (celiac)

Front 66

T10-T11

Back 66

Lesser splanchnic (SMA)

Front 67

S2-S4

Back 67

Sacral/pelvic splanchnic

Front 68

Penis

Back 68

S2 & S3

Front 69

L1

Back 69

Illiac Crest to inner thigh by penis

Front 70

L2

Back 70

Below illiac crest to

anterioraly to inner thigh below the penis