PERIPHERAL NERVOUS SYSTEM (NOT FINISHED)

• CONNECTS THE CNS TO THE BODY

• RESPONSIBLE FOR GETTING THE STIMULI FROM THE CNS TO THE REST OF THE BODY AND VICE VERSA

• MOTOR AND SENSORY IN NATURE

PERIPHERAL NERVOUS SYSTEM

THIS IS THE DORSAL ROOT

DORSAL HORN

• VENTRAL + DORSAL ROOT

• IT IS A TWO WAY PROCESS (AFFERENT AND EFFERENT)

SPINAL ROOT

• CARRIES MAINLY SENSORY INFORMATION COMING FROM SPINAL ROOT

• ONE WAY (SENSORY INFORMATION)

DORSAL ROOT

SENDS INFORMATION INTO DORSAL HORN

DORSAL ROOT GANGLION

• CELL BODY IS THE ANTERIOR HORN CELL THAT GIVES MOTOR STIMULUS OUT TO THE VENTRAL ROOT

• IT IS EFFERENT

VENTRAL ROOT

THIS IS THE BACKBONE OF THE PNS

PERIPHERAL NERVE NEURON

WHERE CAN YOU FIND THE MOTOR CELL BODY?

ANTERIOR HORN CELL

WHERE CAN YOU FIND THE SENSORY CELL BODY?

DORSAL ROOT GANGLION

SUBWAY SYSTEM; RESPONSIBLE FOR THE TRANSPORT OF ATP FROM THE CELL BODY TO THE REST OF THE AXON

MICROTUBULES

THIS WRAPS A NEURON

ENDONERIUM

THIS WRAPS THE SPINAL ROOT

PERINEURIUM

THIS WRAPS THE PERIPHERAL NERVE

EPINEURIUM

WHAT IS THE BLOOD SUPPLY OF PERIPHERAL NERVE?

VASA NERVORUM

COMPRESSION OF THE WHOLE NERVE

NEUROPRAXIA

AXON CUT BUT NERVE SHEATH INTACT (STARVATION ISSUES, PERIPHERAL NERVES CANNOT GET RAW MATERIALS FOR METABOLISM)

AXONOTMESIS

BOTH AXONS AND NERVE SHEATHS CUT

NEUROTMESIS

PATHWAY OF THE LOWER MOTOR (ANT. HORN CELL)

ANT. HORN CELL - AXON GOGES TO THE VENTRAL ROOT - SPINAL ROOT - PERIPHERAL NERVE ASSIGNED TO THE MUSCLE CONNECTED

THIS RECEPTORS SENSE SENSORY FEEDBACK

MUSCLE SPINDLES

THESE ARE RESPONSIBLE IN MOVING EXTRAFUSAL MUSCLES OR SKELETAL MUSCLES; CAN BE PURE MOTOR OR MIX SENSORY

LOWER MOTOR NEURON

WHAT ARE THE 2 TYPE OF MUSCLE SPINDLES?

EXTRAFUSAL FIBERS

INTRAFUSAL FIBERS

THESE ARE THE SKELETAL MUSCLES THAT ARE INNERVATED BY ALPHA MOTOR NEURONS FOR PRIMARY MOTOR MOVEMENT

EXTRAFUSAL FIBERS

THESE ARE THE MUSCLES AT THE END OF THE MUSCLE SPINDLES TO KEEP IT TIGHT/ TAUT; INNERVATED BY GAMMA MOTOR NEURONS

INTRAFUSAL FIBERS

THESE IS THE CONNECTION WITH THE PERIPHERAL NERVES TO THE MUSCLE ITSELF

NEUROMUSCULAR JUNCTION

IT IS THE NEUROTRANSMITTER THAT CROSSES THE SYNAPTIC CLEFT AND GO TO THE RECEPTORS IN THE CONVOLUTED AREA

ACETYLCHOLINE

IF MUSCLE IS CONTINUOUSLY STRETCHED, IT RELAXES THE MUSCLE RATHER THAN CONTRACTING IT

GOLGI TENDON ORGAN

WHEN A MUSCLE IS STRETCHED IT SENDS AN IMPULSE BACK INTO THE PERIPHERAL NERVES, THIS WILL SENDS INTO THE DORSAL HORN INTO INTERNEURON AS IT WILL CONTRACT THAT MUSCLE

DEEP TENDON REFLEX