Skip to main content
Back

Study Guidance for Central and Peripheral Nervous System (Spinal Cord & PNS)

NotesPracticeVideo lessons

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Q12. List the basic structures and functions of the spinal cord.

Background

Topic: Central Nervous System – Spinal Cord Anatomy and Physiology

This question tests your understanding of the main anatomical features of the spinal cord and their respective roles in the nervous system.

Key Terms:

  • Spinal cord

  • Central canal

  • White matter

  • Gray matter

  • Spinal nerves

  • Reflexes

Step-by-Step Guidance

  1. Identify the main anatomical regions of the spinal cord (e.g., cervical, thoracic, lumbar, sacral).

  2. List the major structures found within the spinal cord, such as the central canal, gray matter, white matter, and spinal nerves.

  3. Describe the general function of each structure (e.g., white matter for signal transmission, gray matter for processing).

  4. Consider the overall roles of the spinal cord, such as conducting sensory and motor information and mediating reflexes.

Try solving on your own before revealing the answer!

Q13. Describe the three layers of the spinal meninges and the spaces in between them.

Background

Topic: Central Nervous System – Meninges

This question focuses on the protective coverings of the spinal cord and the anatomical spaces between these layers.

Key Terms:

  • Dura mater

  • Arachnoid mater

  • Pia mater

  • Epidural space

  • Subdural space

  • Subarachnoid space

Step-by-Step Guidance

  1. Name the three layers of the spinal meninges from outermost to innermost.

  2. Describe the location and characteristics of each meningeal layer.

  3. Identify and describe the spaces found between these layers (e.g., what is found in the subarachnoid space?).

  4. Consider the functional significance of each layer and space (e.g., protection, CSF circulation).

Try solving on your own before revealing the answer!

Q14. Describe the organization of the spinal cord white matter into ascending and descending columns and explain the organization and patterns of spinal cord tracts.

Background

Topic: Spinal Cord White Matter and Tracts

This question tests your knowledge of how white matter is organized and how information travels within the spinal cord.

Key Terms and Concepts:

  • White matter columns (funiculi): anterior, lateral, posterior

  • Ascending tracts (sensory)

  • Descending tracts (motor)

  • Tract organization (bundles of axons)

Step-by-Step Guidance

  1. Identify the three main columns (funiculi) of white matter in the spinal cord.

  2. Distinguish between ascending (sensory) and descending (motor) tracts and where they are located.

  3. Explain the general pattern of how tracts are organized within these columns.

  4. Discuss the significance of this organization for nervous system function.

Try solving on your own before revealing the answer!

Q15. Name and describe the roles of the main sensory tracts and motor pathways.

Background

Topic: Spinal Cord Tracts – Sensory and Motor Pathways

This question asks you to identify the major pathways for sensory and motor information in the spinal cord and their functions.

Key Terms:

  • Spinothalamic tract

  • Dorsal column-medial lemniscus pathway

  • Corticospinal tract

  • Spinocerebellar tract

Step-by-Step Guidance

  1. List the main sensory tracts and briefly describe the type of information each carries.

  2. List the main motor pathways and their general roles.

  3. Explain the direction of information flow for each tract (ascending or descending).

  4. Relate each tract to its functional significance in the nervous system.

Try solving on your own before revealing the answer!

Q16. Describe the organization of the spinal cord grey matter into dorsal (posterior), lateral and ventral (anterior) horns, including what structures and neurons you would find in each.

Background

Topic: Spinal Cord Grey Matter Organization

This question focuses on the internal structure of the spinal cord and the types of neurons found in each region of the grey matter.

Key Terms:

  • Dorsal horn

  • Lateral horn

  • Ventral horn

  • Sensory neurons

  • Motor neurons

  • Interneurons

Step-by-Step Guidance

  1. Identify the three main regions (horns) of the spinal cord grey matter.

  2. Describe the general shape and location of each horn in a cross-section.

  3. List the types of neurons and structures found in each horn.

  4. Relate the function of each horn to its neuronal composition.

Try solving on your own before revealing the answer!

Q17. Describe the dorsal root, dorsal root ganglion and ventral root, including what structures you would find in each.

Background

Topic: Spinal Nerve Roots and Ganglia

This question tests your understanding of the structures that connect the spinal cord to peripheral nerves and their functional roles.

Key Terms:

  • Dorsal root

  • Dorsal root ganglion

  • Ventral root

  • Sensory neurons

  • Motor neurons

Step-by-Step Guidance

  1. Define the dorsal root and describe what type of fibers it contains.

  2. Explain the structure and function of the dorsal root ganglion.

  3. Describe the ventral root and the types of neurons it contains.

  4. Relate these structures to the flow of sensory and motor information.

Try solving on your own before revealing the answer!

Q1. Define the peripheral nervous system and list its components.

Background

Topic: Peripheral Nervous System (PNS) Overview

This question asks you to define what the PNS is and identify its main anatomical components.

Key Terms:

  • Peripheral nervous system (PNS)

  • Cranial nerves

  • Spinal nerves

  • Ganglia

  • Plexuses

Step-by-Step Guidance

  1. Write a concise definition of the peripheral nervous system.

  2. List the main components that make up the PNS.

  3. Briefly mention the general function of the PNS in relation to the CNS.

Try solving on your own before revealing the answer!

Q2. Describe the general structure of a nerve.

Background

Topic: Nerve Structure

This question focuses on the anatomical organization of a nerve, including its connective tissue coverings and internal components.

Key Terms:

  • Endoneurium

  • Perineurium

  • Epineurium

  • Fascicle

  • Axon

Step-by-Step Guidance

  1. Identify the three connective tissue layers that surround nerves and their order from innermost to outermost.

  2. Describe what each layer surrounds (e.g., individual axons, fascicles, entire nerve).

  3. Explain the functional significance of this organization.

Try solving on your own before revealing the answer!

Q3. Describe the general structure of a spinal nerve and the general distribution of its rami (dorsal ramus, ventral ramus, and communicating ramus).

Background

Topic: Spinal Nerve Anatomy and Branches

This question tests your understanding of how spinal nerves are organized and how their branches distribute to different body regions.

Key Terms:

  • Spinal nerve

  • Dorsal ramus

  • Ventral ramus

  • Communicating ramus

Step-by-Step Guidance

  1. Describe the formation of a spinal nerve from dorsal and ventral roots.

  2. Identify the three main branches (rami) of a spinal nerve.

  3. Explain the general area each ramus supplies.

  4. Discuss the functional significance of these branches.

Try solving on your own before revealing the answer!

Q4. Describe the structure and function of the types of neurons in mixed nerves.

Background

Topic: Mixed Nerves and Neuron Types

This question asks you to explain what mixed nerves are and the types of neurons they contain.

Key Terms:

  • Mixed nerve

  • Sensory (afferent) neuron

  • Motor (efferent) neuron

Step-by-Step Guidance

  1. Define what a mixed nerve is.

  2. Describe the structure of sensory and motor neurons found in mixed nerves.

  3. Explain the function of each neuron type within the nerve.

Try solving on your own before revealing the answer!

Q5. Define ganglion.

Background

Topic: Peripheral Nervous System Structures

This question focuses on the definition and significance of ganglia in the nervous system.

Key Terms:

  • Ganglion

  • Neuron cell body

Step-by-Step Guidance

  1. Write a concise definition of a ganglion.

  2. Describe where ganglia are typically found in the nervous system.

  3. Explain their functional significance.

Try solving on your own before revealing the answer!

Q6. Define plexus. Name the major plexuses and describe the distribution and function of the peripheral nerves arising from each plexus.

Background

Topic: Nerve Plexuses

This question tests your knowledge of what a plexus is and the major nerve plexuses in the body.

Key Terms:

  • Plexus

  • Cervical plexus

  • Brachial plexus

  • Lumbar plexus

  • Sacral plexus

Step-by-Step Guidance

  1. Define what a nerve plexus is.

  2. Name the four major plexuses in the human body.

  3. Describe the general body regions and functions associated with each plexus.

  4. List at least one major nerve arising from each plexus and its function.

Try solving on your own before revealing the answer!

Q7. Name the components of a reflex arc and distinguish between autonomic and somatic reflexes.

Background

Topic: Reflex Arcs

This question asks you to identify the basic components of a reflex arc and compare two types of reflexes.

Key Terms:

  • Reflex arc

  • Receptor

  • Sensory neuron

  • Integration center

  • Motor neuron

  • Effector

  • Autonomic reflex

  • Somatic reflex

Step-by-Step Guidance

  1. List the five basic components of a reflex arc in order.

  2. Define each component's role in the reflex.

  3. Explain the difference between autonomic and somatic reflexes, including examples of each.

Try solving on your own before revealing the answer!

Q8. Compare and contrast stretch, flexor, crossed-extensor, and tendon reflexes.

Background

Topic: Types of Reflexes

This question tests your ability to distinguish between different types of spinal reflexes based on their mechanisms and functions.

Key Terms:

  • Stretch reflex

  • Flexor (withdrawal) reflex

  • Crossed-extensor reflex

  • Tendon reflex

Step-by-Step Guidance

  1. Define each type of reflex and its primary function.

  2. Describe the stimulus that triggers each reflex.

  3. Compare the neural pathways involved (e.g., monosynaptic vs. polysynaptic).

  4. Contrast the outcomes or effects produced by each reflex.

Try solving on your own before revealing the answer!

Q9. Outline the events that lead to sensation and perception.

Background

Topic: Sensory Processing

This question asks you to describe the sequence of events from the detection of a stimulus to conscious awareness.

Key Terms:

  • Sensation

  • Perception

  • Receptor

  • Transduction

  • Transmission

  • Integration

Step-by-Step Guidance

  1. List the steps involved in converting a stimulus into a sensation.

  2. Describe how sensory information is transmitted to the CNS.

  3. Explain how the brain interprets these signals as perception.

Try solving on your own before revealing the answer!

Q10. Name the cranial nerves (name and Roman numeral) and describe the main function of each one and whether it is a sensory only, motor only, or mixed nerve.

Background

Topic: Cranial Nerves

This question tests your ability to recall the names, numbers, and functions of the cranial nerves, as well as their classification.

Key Terms:

  • Cranial nerves I–XII

  • Sensory nerve

  • Motor nerve

  • Mixed nerve

Step-by-Step Guidance

  1. List all twelve cranial nerves by name and Roman numeral.

  2. For each nerve, briefly state its main function.

  3. Indicate whether each nerve is sensory, motor, or mixed.

  4. Consider using a table or mnemonic to help organize the information.

Try solving on your own before revealing the answer!

Pearson Logo

Study Prep