Landmark dermatomes and reflexes Flashcards
C2
Posterior half of a skull cap
C3
high turtleneck shirt
C4
low collar shirt
T4
at the nipple
“T4 at the teat pore”
T7
the xiphoid process
Because 7 sticks out like the xiphoid process
T10
at the umbilicus
“T10 at the belly butTEN”
L1
At the inguinal ligament
L1 is IL (inguinal ligament)
L4
…includes the kneecaps
Down on ALL 4 (L4)
S2,3,4
erection, sensation of penile and anal zone
S2,3,4 keeps your penis off the floor.
Reflex: bicep
C5,6
hmm no reflex from thoracic!
Reflex: tricep
C7,8
hmm no reflex from thoracic!
Reflex: patella
L3,4
hmm no reflex from thoracic!
Reflex: achillis
S1,2
hmm no reflex from thoracic!
Reflex: babinski
Dorsiflexion of the big toe and fanning of the other toes;
sign of UMN lesion, but normal reflex in 1st year of life
How to remember reflex
Reflexes count up in order S1,2 L3,4 C5,6 C7,8
Primitive reflex: definition
CNS reflexes that are present in healthy infants, but absent in neurologically intact adults.
Normally disappear in the 1st year of life.
These primitive reflexes are inhibited by a mature/developing frontal lobe.
They may re-emerge in adults following frontal lobe lesions–loss of inhibition of these reflexes
Primitive reflex: moro reflex
Hanging on for life
Abduct/extend limbs when startled and then draw together.
Primitive reflex: rooting reflex
Movement of head toward one side if cheek or mouth is stroked “nipple seeking”
Primitive reflex: sucking reflex
Sucking response when root of mouth is touched
Primitive reflex: palmar reflex
Curling of fingers if palm is stroked
Primitive reflex: plantar reflex
Dorsiflexion of large toe and fanning of the other with platar stimulation
Primitive reflex: galant reflex
Stroking alone one side of the spine while newborn is in ventral suspension (face down) causes lateral flexion of lower body toward stimulated side.
