SCS foundations Flashcards
Carries sensory impulses to the brain
Dorsal root
Dermatome serves neck, shoulders, and portions of the upper limbs
Cervical dermatomes
Dermatome serves trunk of the body and the upper limbs
Thoracic dermatome
Dermatome serves anterior legs
Lumbar dermatome
Dermatome serves buttocks and posterior legs
Sacral dermatomes
SCS consists of three parts:
Electrodes on one or more leads
Power source
An extension (optional for some)
Describes how non painful input closes the gate to painful input, explains in the prevention of pain sensation traveling from the CNS to the brain
Gate control theory
Sensory receptors
Nociceptors
Afferent fibers, are the largest in size, are myelinated and have the fastest conductive velocity
A-alpha and A-beta
3 components required to create a closed electrical circuit
Power source
Conductor
Resistance
Measure of work needed to move an electrical charge
Voltage
Strength or height of a wave disturbance such as an electromagnetic wave
Amplitude (voltage or current (I))
Flow of electrons pushed through a circuit over time
Current (Amperes)
The inhibition of the flow of electrons in a circuit
Resistance (ohms)
Ohms law
V= I (amps) x R (resistance)
Impedance is a result of a variety of factors:
Material resistance (leads,extensions)
Scar tissue
Fluid (CSF)
Region directly beneath the bony and ligamentous elements forming the vertebral canal
Epidural space
Space which surrounds the spinal cord and lies between the pis and arachnoid mater containing CSF
Intrathecal space