Anatomy of the Ventricular System in the Brain
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Questions and Answers

What is the main function of the peripheral nervous system?

  • To provide structural support to the brain and spinal cord
  • To serve as the integration and command center of the body
  • To communicate between the central nervous system and all parts of the body (correct)
  • To protect the brain and spinal cord

Which component of the nervous system is responsible for voluntary movements from the CNS to skeletal muscles?

  • Motor division (correct)
  • Spinal nerves
  • Sensory division
  • Central nervous system

What is the function of the cervical plexus?

  • Originates from the thoracic region and controls abdominal organs
  • Originates from the sacral region and controls pelvic functions
  • Originates from the lumbar region and controls lower body movements
  • Originates from the cervical region and controls muscles in the neck and upper body (correct)

What is a dermatome?

<p>An area of skin that sends sensory information to a specific spinal nerve (B)</p> Signup and view all the answers

Which part of the nervous system serves as the integration and command center of the body?

<p>Central Nervous System (A)</p> Signup and view all the answers

What is the role of the blood-brain barrier?

<p>To prevent harmful substances from entering the brain tissue from the bloodstream (C)</p> Signup and view all the answers

Which ventricle communicates with the 3rd ventricle in the diencephalon via the interventricular foramen?

<p>Right ventricle (C)</p> Signup and view all the answers

What connects the 4th ventricle to the central canal?

<p>Cerebral aqueduct (B)</p> Signup and view all the answers

What is the function of the cerebral cortex?

<p>Initiate voluntary movements (C)</p> Signup and view all the answers

Which area of the cerebral cortex is only 2-4 mm thick but has many convolutions, increasing its surface area?

<p>Gray matter (D)</p> Signup and view all the answers

What type of fissure separates the frontal and parietal lobes of the cerebral hemispheres?

<p>Central sulcus (D)</p> Signup and view all the answers

Which functional area of the cerebral cortex involves handling sensory and motor functions of the contralateral side of the body?

<p>Motor area (C)</p> Signup and view all the answers

What is the primary function of microglia in the nervous system?

<p>Engulfing micro-organisms and cellular debris (D)</p> Signup and view all the answers

Which type of cells form a permeable barrier between cerebrospinal fluid (CSF) and tissue fluid bathing CNS cells?

<p>Ependymal cells (A)</p> Signup and view all the answers

What is the role of Schwann cells in the peripheral nervous system (PNS)?

<p>Forming myelin sheaths around larger neurons (A)</p> Signup and view all the answers

Neurons are highly specialized cells that conduct impulses. Which characteristic is NOT true about neurons?

<p>Short lifespan (B)</p> Signup and view all the answers

Which type of neurons carry impulses away from the central nervous system (CNS) to effectors?

<p>Motor neurons (A)</p> Signup and view all the answers

What is the primary function of gray matter in the spinal cord and brain?

<p>Supporting and protecting nerve cells (B)</p> Signup and view all the answers

What is the main function of the thalamus?

<p>Sorting and editing sensory information to send to the cortex (B)</p> Signup and view all the answers

Which hemisphere is typically dominant for visual-spatial skills, intuition, and artistic skills?

<p>Right hemisphere (D)</p> Signup and view all the answers

What do association fibers connect within the brain?

<p>Different lobes within the same hemisphere (B)</p> Signup and view all the answers

Which structure is known as the 'gateway to the cerebral cortex'?

<p>Thalamus (B)</p> Signup and view all the answers

What is the function of commissural fibers in the brain?

<p>Connect corresponding areas between the two brain hemispheres (B)</p> Signup and view all the answers

Which part of the brain includes the caudate nucleus and lentiform nucleus?

<p>Basal Nuclei (C)</p> Signup and view all the answers

What do projection fibers connect within the nervous system?

<p>Cortex to rest of nervous system (C)</p> Signup and view all the answers

What does the hypothalamus regulate?

<p>Emotion and visceral function (B)</p> Signup and view all the answers

What is the primary role of the corpus callosum in the brain?

<p>Connecting corresponding areas between brain hemispheres (C)</p> Signup and view all the answers

What is the role of projection fibers in the brain?

<p>Connect cortex to rest of nervous system (A)</p> Signup and view all the answers

What is the main function of the flocculonodular lobes in the cerebellum?

<p>Receiving input from equilibrium sensors (B)</p> Signup and view all the answers

Which fiber tract connects the cerebellum to the midbrain for sending instructions to the motor cortex?

<p>Superior (outgoing) (A)</p> Signup and view all the answers

What type of communication occurs in the middle peduncles connecting the pons to the cerebellum?

<p>One-way communication from pons to cerebellum (D)</p> Signup and view all the answers

What type of information is carried by the inferior peduncles connecting the medulla to the cerebellum?

<p>Sensory information from muscle proprioceptors and vestibular nuclei (D)</p> Signup and view all the answers

Which part of the brain sends collaterals to the cerebellum indicating the intent to initiate an action?

<p>Cerebral motor cortex (D)</p> Signup and view all the answers

What kind of information does the cerebellum receive from visual and equilibrium pathways?

<p>Proprioceptive information and location data (D)</p> Signup and view all the answers

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