NERVE CONDUCTION EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2025
PNS can be classified on what attributes? - Answers Myelination
Somatic
Autonomic
PNS consists of: - Answers Nerves and ganglia that extend from the brain and the spinal cord
bundles of peripheral nerve fibers; provide strength and diffusion barrier - Answers Fascicles
outer protection of individual fascicles - Answers Perineum
a. surrounding layer of fascicles, veins and arteries- protect nerve from compression - Answers
Epineurium
Large diameter and heavily myelinated nerve fibers conduct impulses much - Answers faster
Small diameter , unmyelinated nerve fibers conduct impulses much - Answers slower
heavily myelinated (fastest fibers), micron units - Answers Type A Nerve Fiber
myelinated but not as much as Type A - Answers Type B nerve fiber
unmyelinated, smallest diameters of the peripheral nerves (slowest fibers) - Answers Type C nerve fiber
Axons -Communication link between what? - Answers CNS and Periphery and part or Nerve impulse
propagation
conduct electrical impulses and are composed of the same basic elements - Answers Axons
A jelly like substance that helps with controlling conduction - Answers Axoplasm
Axons Conduct in orthodromic or antidromic direction? - Answers orthodromic
afferent (to spinal cord) - Answers Sensory
efferent (to neuromuscular junction) - Answers Motor
Composed of: sensory receptors, axons, sensory cell bodies, and the respective synapses - Answers
Sensory (afferent)
Obtain information from the periphery and transmit it to the spinal cord and brain (to CNS) - Answers
Sensory (afferent)
Composed of: a cell body, axon, neuromuscular junction, and the muscle finer in which it innervates -
Answers Motor (efferent)
, Primary function: to control skeletal muscles - Answers Motor (efferent)
The space at the terminals where chemical excitation occurs and allow transmission between neurons -
Answers Synapse
Cells communicate by - Answers releasing neurotransmitters
presynaptic side contains - Answers synaptic vesicles
postsynaptic side contains - Answers neurotransmitter modules
Space that separates the pre- and post-synaptic sides of the synapse and where the neurotransmitters
are released - Answers synaptic cleft
transmits info such as pain, pressure and limb position to the brain. - Answers Sensory Pathways
travel through the dorsal root ganglion into the spinal cord - Answers Sensory Pathways
Nerve impulses axon to - Answers Neuromuscular junction
Chemical transmission in the synaptic junction between the nerve fiber termination point to excite the
muscle fibers - Answers Purpose of NMJ
What is the importance of the Nodes of Ranvier? - Answers The nodes are nodules or indentations in the
myelination of axons that helps the action potential maintain conduction velocity and travel for longer
distances as the impulses "jumps" from node to node down an axon (saltatory conduction)
During depolarization of a nerve, the electrical chain of events occurs NODE TO NODE rather than cell to
cell - Answers Saltatory Conduction
Sensation to the face - Answers CN V, trigeminal nerve
Muscle movements of the face, including smiling and blinking - Answers CN VII, facial nerve
Innervated the trapezius muscle - Answers CN XII, accessory nerve
pairs according to their related vertebra - Answers 31
t/f C1-C7 exit above vertebra - Answers true
t/f C8 exits below C7 vertebra and above T1 vertebra,
Rest of nerves exit below their designated vertebra - Answers true
sensory/afferent/periphery to CNS - Answers dorsal root
motor/efferent/CNS to periphery - Answers ventral root
Spinal Roots join outside the spinal cord to form the - Answers Spinal Nerve
PNS can be classified on what attributes? - Answers Myelination
Somatic
Autonomic
PNS consists of: - Answers Nerves and ganglia that extend from the brain and the spinal cord
bundles of peripheral nerve fibers; provide strength and diffusion barrier - Answers Fascicles
outer protection of individual fascicles - Answers Perineum
a. surrounding layer of fascicles, veins and arteries- protect nerve from compression - Answers
Epineurium
Large diameter and heavily myelinated nerve fibers conduct impulses much - Answers faster
Small diameter , unmyelinated nerve fibers conduct impulses much - Answers slower
heavily myelinated (fastest fibers), micron units - Answers Type A Nerve Fiber
myelinated but not as much as Type A - Answers Type B nerve fiber
unmyelinated, smallest diameters of the peripheral nerves (slowest fibers) - Answers Type C nerve fiber
Axons -Communication link between what? - Answers CNS and Periphery and part or Nerve impulse
propagation
conduct electrical impulses and are composed of the same basic elements - Answers Axons
A jelly like substance that helps with controlling conduction - Answers Axoplasm
Axons Conduct in orthodromic or antidromic direction? - Answers orthodromic
afferent (to spinal cord) - Answers Sensory
efferent (to neuromuscular junction) - Answers Motor
Composed of: sensory receptors, axons, sensory cell bodies, and the respective synapses - Answers
Sensory (afferent)
Obtain information from the periphery and transmit it to the spinal cord and brain (to CNS) - Answers
Sensory (afferent)
Composed of: a cell body, axon, neuromuscular junction, and the muscle finer in which it innervates -
Answers Motor (efferent)
, Primary function: to control skeletal muscles - Answers Motor (efferent)
The space at the terminals where chemical excitation occurs and allow transmission between neurons -
Answers Synapse
Cells communicate by - Answers releasing neurotransmitters
presynaptic side contains - Answers synaptic vesicles
postsynaptic side contains - Answers neurotransmitter modules
Space that separates the pre- and post-synaptic sides of the synapse and where the neurotransmitters
are released - Answers synaptic cleft
transmits info such as pain, pressure and limb position to the brain. - Answers Sensory Pathways
travel through the dorsal root ganglion into the spinal cord - Answers Sensory Pathways
Nerve impulses axon to - Answers Neuromuscular junction
Chemical transmission in the synaptic junction between the nerve fiber termination point to excite the
muscle fibers - Answers Purpose of NMJ
What is the importance of the Nodes of Ranvier? - Answers The nodes are nodules or indentations in the
myelination of axons that helps the action potential maintain conduction velocity and travel for longer
distances as the impulses "jumps" from node to node down an axon (saltatory conduction)
During depolarization of a nerve, the electrical chain of events occurs NODE TO NODE rather than cell to
cell - Answers Saltatory Conduction
Sensation to the face - Answers CN V, trigeminal nerve
Muscle movements of the face, including smiling and blinking - Answers CN VII, facial nerve
Innervated the trapezius muscle - Answers CN XII, accessory nerve
pairs according to their related vertebra - Answers 31
t/f C1-C7 exit above vertebra - Answers true
t/f C8 exits below C7 vertebra and above T1 vertebra,
Rest of nerves exit below their designated vertebra - Answers true
sensory/afferent/periphery to CNS - Answers dorsal root
motor/efferent/CNS to periphery - Answers ventral root
Spinal Roots join outside the spinal cord to form the - Answers Spinal Nerve
