NeuroscienceLesson 2 of 4 in the course The Nervous System

CNS Coverings, Brain Organization, and Spinal Cord Pathways

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

The central nervous system (CNS) consists of the brain and spinal cord. These structures need protection, cushioning, and a stable environment in order to function. This lesson introduces the coverings of the CNS, the production and roles of cerebrospinal fluid, and hydrocephalus.

The names are helpful reminders: dura means hard, while pia means soft. The layers work together to protect delicate nervous tissue.

All flashcards

What are the meninges?
Three protective connective-tissue layers surrounding the brain and spinal cord: dura mater, arachnoid mater, and pia mater.
What are three functions of cerebrospinal fluid?
CSF cushions the brain and spinal cord, supports the brain through buoyancy, and circulates chemical substances.
What connects the cerebral hemispheres?
The corpus callosum is a thick bundle of fibers that allows information to pass between the hemispheres.
What is the hypothalamus involved in regulating?
It helps regulate body temperature, food and water intake, energy use, and circadian rhythms.
What roles does the cerebellum support?
Balance, movement coordination, and learning new motor tasks.

Quiz questions

  1. Which structure connects the right and left cerebral hemispheres and allows information to pass between them?Answer: The corpus callosum.
  2. Which lobe is especially involved in processing touch, pressure, pain, temperature, and body position?Answer: The parietal lobe.
  3. Which brain structure acts as a gateway for sensory and motor information traveling to and from the cortex?Answer: The thalamus.
  4. Which three parts make up the brainstem?Answer: The midbrain, pons, and medulla oblongata.
  5. Why can some spinal reflexes produce a response before the brain directs the movement?Answer: Local spinal cord connections can generate the response rapidly.

Based on Biology 2e by Mary Ann Clark, Matthew Douglas, Jung Choi (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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