Neuro13 Flashcards
Dermatomes Reflexes Primitive Reflexes
Dermatome:
- C2
Posterior half of a skull “cap”
Dermatome:
- C3
High turtleneck shift
Dermatome:
- C4
Low-collar shirt
Dermatome:
- T4
Nipple
“T4 at the teat pore”
Dermatome:
- T7
Xiphoid process
Dermatome:
- T10
Ubilicus
“T10 at the belly butTEN”
*important for early appendicitis pain referral
Dermatome:
- L1
Inguinal Ligament
“L1 is IL (inguinal ligament)”
Dermatome:
- L4
Includes Kneecaps
“down on ALL 4’s (L4)
Dermatome:
- S2, S3, S4
Erection and sensation of penile and anal zones
“S2,3,4 keep the penis off the floor”
Dermatome:
- Xiphoid process
T7
Dermatome:
- High Turtleneck shirt
C3
Dermatome:
- Kneecaps
L4
Dermatome:
- Inguinal Ligament
L1
Dermatome:
- Posterior half of a skull “cap”
C2
Dermatome:
- Umbilicus
T10
Dermatome:
- Low collar shirt
C4
Dermatome:
- Nipple
T4
Dermatome:
- Erection and sensation of penile and anal zones
S2,S3,S4
Clinical Reflexes:
- Biceps
C5 nerve root
Clinical Reflexes:
- Triceps
C7 nerve root
Clinical Reflexes:
- Brachioradialis
C6 nerve root
Clinical Reflexes:
- Patella
L4 nerve root
Clinical Reflexes:
- Achilles
S1 nerve root
What is the pathway of the reflex arc tested by clinical reflexes?
1-Muscle stretch (hammer hitting tendon)
2-Intrafusal stretch (regulates muscle length)
3-Stimulates 1a Afferent (carries impulse to Dorsal Horn)
4-Synapses on alpha-motor neuron
5-Reflex Extrafusal contraction
What are primitive reflexes?
CNS reflexes that are present in a healthy infant, but absent in a neurologically intact adult
*Normally disappear within 1st year of life
Moro reflex =
“Hang on for life” reflex
Abduct/Extend limbs when started, and then draw together
Rooting reflex =
“Nipple Seeking”
Movement of head toward one side if cheek or mouth is stroked
Sucking reflex =
Sucking response when roof of mouth is touched
Palmar reflex =
Curling of fingers if palm is stroked
Plantar reflex =
Dorsiflexion of large toe and fanning of other toes with plantar stimulation
*Babinski sign – presence of this reflex in an adult, signifies UMN lesion
Galant reflex =
Stroking along one side of spine while newborn is in ventral suspension (face-down) causes lateral flexion of lower body toward stimulated side
