Anatomy of the Ventricular System in the Brain

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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?

An area of skin that sends sensory information to a specific spinal nerve Signup and view all the answers

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

Central Nervous System Signup and view all the answers

What is the role of the blood-brain barrier?

To prevent harmful substances from entering the brain tissue from the bloodstream Signup and view all the answers

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

Right ventricle Signup and view all the answers

What connects the 4th ventricle to the central canal?

Cerebral aqueduct Signup and view all the answers

What is the function of the cerebral cortex?

Initiate voluntary movements 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?

Gray matter Signup and view all the answers

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

Central sulcus 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?

Motor area Signup and view all the answers

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

Engulfing micro-organisms and cellular debris Signup and view all the answers

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

Ependymal cells Signup and view all the answers

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

Forming myelin sheaths around larger neurons Signup and view all the answers

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

Short lifespan Signup and view all the answers

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

Motor neurons Signup and view all the answers

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

Supporting and protecting nerve cells Signup and view all the answers

What is the main function of the thalamus?

Sorting and editing sensory information to send to the cortex Signup and view all the answers

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

Right hemisphere Signup and view all the answers

What do association fibers connect within the brain?

Different lobes within the same hemisphere Signup and view all the answers

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

Thalamus Signup and view all the answers

What is the function of commissural fibers in the brain?

Connect corresponding areas between the two brain hemispheres Signup and view all the answers

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

Basal Nuclei Signup and view all the answers

What do projection fibers connect within the nervous system?

Cortex to rest of nervous system Signup and view all the answers

What does the hypothalamus regulate?

Emotion and visceral function Signup and view all the answers

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

Connecting corresponding areas between brain hemispheres Signup and view all the answers

What is the role of projection fibers in the brain?

Connect cortex to rest of nervous system Signup and view all the answers

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

Receiving input from equilibrium sensors Signup and view all the answers

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

Superior (outgoing) Signup and view all the answers

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

One-way communication from pons to cerebellum Signup and view all the answers

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

Sensory information from muscle proprioceptors and vestibular nuclei Signup and view all the answers

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

Cerebral motor cortex Signup and view all the answers

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

Proprioceptive information and location data Signup and view all the answers