Basic definitions

Question 1

Tract vs. Nerve

Answer 1

Bundle of nerve fibers within the CNS which have same origin and destination is called a
tract
Bundle of nerve fibers within the peripheral nervous system is called a nerve

Question 2

White matter vs Grey matter

Answer 2

Grey matter is composed of cell bodies and unmyelinated fibers.
White matter is composed of myelinated fibers.

Question 3

Nucleus vs Ganglion

Answer 3

Group of cell bodies within the CNS is called a nucleus
Group of cell bodies outside the CNS is called a Ganglion

Question 4

Afferent fibers vs efferent fibers

Answer 4

Fibers which carry impulses towards the CNS are afferent fibers.
Fibers which carry impulses away from the CNS are efferent fibers.

Question 5

Ipsilateral vs contralateral

Answer 5

Ipsilateral means same side
Contralateral means opposite side

Question 6

Synapse

Answer 6

The junction between the two neurons is called synapse.

Question 7

Pre- synaptic neuron & post-synaptic
neuron

Answer 7

The neuron before the synapse is called pre synaptic neuron
The neuron after the synapse is called post synaptic neuron

Question 8

Decussation

Answer 8

The point where nerve fibers cross from one side to other side