The Nervous System Overview
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Questions and Answers

Match the following parts of the brain with their corresponding orientation:

Dorsal = Upper part of the horizontal plane Ventral = Lower part of the horizontal plane Anterior = Front of the coronal plane Posterior = Back of the coronal plane

Match the following types of brain tissue with their characteristics:

White Matter = Consists mostly of axons with myelin sheaths Gray Matter = Contains more cell bodies and dendrites Fiber/Tract = A bundle of axons Myelin = Insulation around axons

Match the following planes of the brain with their functions:

Horizontal Plane = Divides the brain into upper and lower parts Sagittal Plane = Divides the brain into right and left halves Midsagittal = Divides the brain directly in the center Coronal Plane = Divides the brain into front and back regions

Match the following components of the Enteric Nervous System (ENS) and their characteristics:

<p>ENS = Sometimes referred to as the 'second brain' CNS = Central nervous system that communicates with the ENS Independent operation = ENS operates largely independently Autonomic Nervous System = Regulates involuntary functions including ENS</p> Signup and view all the answers

Match the following views of the brain with their descriptions:

<p>Anterior View = View from the front of the brain Posterior View = View from the back of the brain Lateral View = View from the side of the brain Dorsal View = View from the top of the brain</p> Signup and view all the answers

Match the following brain structures with their primary functions:

<p>Broca’s Area = Speech production Wernicke’s Area = Language comprehension Prefrontal Cortex = Cognitive control and problem solving Cingulate Gyrus = Regulating emotion and pain</p> Signup and view all the answers

Match the following types of brain matter with their descriptions:

<p>White Matter = Axonal fiber tracts; myelin gives it a white appearance Gray Matter = Neuronal cell bodies and dendrites Nuclei = A collection of neurons Gyri = Smooth/flat surfaces of the cerebral cortex</p> Signup and view all the answers

Match the following lobes of the brain with their primary functions:

<p>Frontal Lobe = Higher level cognition and motor control Parietal Lobe = Processes spatial information Temporal Lobe = Audition and aspects of learning Occipital Lobe = Visual processing</p> Signup and view all the answers

Match the following membranes with their characteristics:

<p>Dura mater = Tough outermost sheet Arachnoid = Spiderweb-like cushioning layer Pia mater = Delicate innermost layer Meninges = Three protective membranes surrounding the brain</p> Signup and view all the answers

Match the following structures with their anatomical descriptions:

<p>Central Sulcus = Divides the frontal lobe from the parietal lobe Sylvian (Lateral) Fissure = Separates temporal lobe from frontal and parietal lobes Longitudinal Fissure = Separates the left and right cerebral hemispheres Corpus Callosum = Nerve fiber tracts connecting the two cerebral hemispheres</p> Signup and view all the answers

Match the following cortex areas with their functions:

<p>Auditory Cortex = Processing auditory (sound) stimuli Postcentral Gyrus = Primary somatosensory cortex (touch) Precentral Gyrus = Primary motor cortex (movement control) Orbitofrontal Cortex = Decision making and emotional responses</p> Signup and view all the answers

Match the following cortex regions with their notable features:

<p>Cerebral Cortex = Outermost layer of the brain for higher level processing Gyri = Smooth surfaces of the cerebral cortex Sulci = Grooves/indentations of the cerebral cortex Prefrontal Cortex = Regulates attention and decision making</p> Signup and view all the answers

Match the following areas with their respective contributions:

<p>Broca’s Area = Involved in speech production Wernicke’s Area = Essential for language comprehension Temporal Lobe = Key for hearing and smell Cingulate Gyrus = Involved in emotion regulation</p> Signup and view all the answers

Match the following divisions of the nervous system with their primary functions:

<p>Central Nervous System (CNS) = Processing information and controlling behavior Peripheral Nervous System (PNS) = Connecting the CNS to the body Somatic Nervous System = Controlling voluntary movements Autonomic Nervous System = Regulating involuntary body functions</p> Signup and view all the answers

Match the following components of the Peripheral Nervous System with their characteristics:

<p>Cranial Nerves = 12 paired nerves emerging from the brain Spinal Nerves = 31 pairs of nerves connected to the spinal cord Sympathetic Nervous System = Prepares the body for 'fight or flight' Parasympathetic Nervous System = Promotes 'rest and digest' activities</p> Signup and view all the answers

Match the following functions with the appropriate systems:

<p>Peristalsis = Controlled by the Enteric Nervous System Heart Rate Increase = Sympathetic Nervous System response Secretion of Digestive Enzymes = Function of Enteric Nervous System Muscle Movement = Somatic Nervous System control</p> Signup and view all the answers

Match the following systems with their primary focus:

<p>Sympathetic Nervous System = Increased blood pressure and heart rate Parasympathetic Nervous System = Decreased heart rate and promotes digestion Somatic Nervous System = Voluntary muscle control Enteric Nervous System = Governing gastrointestinal tract functions</p> Signup and view all the answers

Match the following descriptions with the proper nervous system components:

<p>Autonomic Nervous System = Includes the sympathetic and parasympathetic systems Peripheral Nervous System = Connects the brain and spinal cord to the rest of the body Central Nervous System = Consists of the brain and spinal cord Enteric Nervous System = Network of neurons managing digestion</p> Signup and view all the answers

Match each type of nerve with its characteristic region:

<p>Cranial Nerves = Emerge from the brain Spinal Nerves = Emerge from the spinal cord Somatic Nervous System = Controls major muscles Autonomic Nervous System = Regulates internal organs</p> Signup and view all the answers

Match the following nervous system responses with their correct descriptions:

<p>Fight or Flight Response = Related to sympathetic activation Rest and Digest = Associated with parasympathetic activation Control of Viscera = Managed by the autonomic nervous system Voluntary Control = Enabled by the somatic nervous system</p> Signup and view all the answers

Match the following functions to the respective nervous system components:

<p>Activation of Digestive Processes = Primarily governed by the Enteric Nervous System Sensory and Muscle Control = Involves the Somatic Nervous System Response to Stress = Engages the Sympathetic Nervous System Relaxation of Body Functions = Facilitated by the Parasympathetic Nervous System</p> Signup and view all the answers

Match the following brain structures with their primary functions:

<p>Hippocampus = Facilitates learning and memory Amygdala = Regulates emotion (fear and aggressive behavior) Pons = Breathing and heart rate; sleep and dreaming Cerebellum = Regulation of movement, coordination, balance, and posture</p> Signup and view all the answers

Match the following parts of the ventricular system with their descriptions:

<p>Lateral Ventricle = Circulates nutrients to brain; removes waste Third Ventricle = Produces and secretes CSF Cerebral Aqueduct = Canal that connects third and fourth ventricle Fourth Ventricle = Main cushion and shock absorber for the brain</p> Signup and view all the answers

Match the brain structures with their roles in motor control:

<p>Basal Ganglia = Includes structures important for motor control and movement Caudate Nucleus = Motor planning, integrates spatial information with motor behavior Putamen = Involved in the general execution of all movements Subthalamic Nucleus = Involved in motor impulse control and stopping movements</p> Signup and view all the answers

Match the following brain components with their associated functions:

<p>Hypothalamus = Homeostasis, hunger/thirst, body temperature, controls pituitary Thalamus = The sensory 'relay' station; sends sensory information to cortex Inferior Colliculus = Paired gray matter structures that receive auditory information Superior Colliculus = Paired gray matter structures that receive visual information</p> Signup and view all the answers

Match the following components of the Limbic System with their functions:

<p>Limbic System = Includes structures important for emotion, memory, and cognition Mammillary Bodies = Aids in long-term memory consolidation Septal Nuclei = Plays a role in pleasure, reward, and reinforcement Stria Terminals = Controls autonomic, neuroendocrine, and behavioral responses</p> Signup and view all the answers

Match the following structures with their secretory functions:

<p>Pineal Gland = Secretory gland that releases melatonin Choroid Plexus = Produces cerebrospinal fluid (CSF) Substantia Nigra = Produces dopamine and modulates movements Hypothalamus = Controls the anterior pituitary gland</p> Signup and view all the answers

Match the following structures with their specific characteristics:

<p>Olfactory Bulbs = Provides receptors for smell Optic Chiasm = Point where two optic nerves meet; directs visual stimuli Medulla = Breathing, heart rate, blood pressure Midbrain = Integrates sensory information; helps to respond to sound</p> Signup and view all the answers

Match the following areas with their role in memory and learning:

<p>Hippocampus = Aids in memory consolidation and learning Amygdala = Involved in emotional memory processing Mammillary Bodies = Plays a role in long-term memory Stria Terminals = Links emotional responses with memory</p> Signup and view all the answers

Study Notes

The Nervous System

  • The nervous system is divided into the central nervous system (CNS) and the peripheral nervous system (PNS).
  • The CNS is comprised of the brain and spinal cord.
  • The PNS is comprised of all nerves that are located outside of the skull and spinal cord.
  • Nerves are bundles of axons located outside of the CNS.

Peripheral Nervous System

  • The PNS is divided into the somatic nervous system, the autonomic nervous system, and the enteric nervous system.
  • The somatic nervous system connects the brain to major muscles and sensory systems.
  • The autonomic nervous system controls internal organs (viscera).
  • The enteric nervous system is a local network of neurons that governs the function of the gut.

Somatic Nervous System

  • The somatic nervous system is divided into the cranial nerves and the spinal nerves.
  • Cranial nerves are twelve pairs of nerves that emerge directly from the brain, not the spinal cord.
  • Spinal nerves are thirty one pairs of nerves that emerge from the spinal cord and connect it to the body.

Autonomic Nervous System

  • The autonomic nervous system is divided into the sympathetic nervous system, the parasympathetic nervous system, and the enteric nervous system.
  • The sympathetic nervous system activates when the body needs to be prepared for action (fight or flight): blood pressure and heart rate increase, pupils dilate.
  • The parasympathetic nervous system functions in opposition to the sympathetic nervous system (rest and digest).
  • The enteric nervous system (ENS) is a specialized subdivision of the autonomic system responsible for governing the gastrointestinal tract.
  • The ENS is sometimes referred to as the "second brain" because it works largely independently of the CNS but does communicate with it.

Brain Orientation

  • The brain can be viewed in six different perspectives: anterior, posterior, dorsal, ventral, lateral (left), and midsagittal.
  • There are three customary orientations for viewing the brain and body: horizontal, sagittal, and coronal.
  • The horizontal plane divides the brain into a dorsal (upper) and ventral (lower) part.
  • The sagittal plane divides the brain into right and left halves; medial toward midline, lateral away from midline; midsagittal refers to the center.
  • The coronal plane divides the brain into front (anterior) and back (posterior) regions.

Brain Tissue

  • The brain is composed of two main types of tissue: white matter and gray matter.
  • White matter contains mostly axons with white myelin sheaths.
  • Gray matter contains neuronal cell bodies and dendrites, which lack myelin.
  • White matter tracts are bundles of axons.
  • Gray matter nuclei are collections of neurons.

Brain Surface and Structure

  • Gyri are the smooth surface of the cerebral cortex.
  • Sulci are the groves/indentations of the cerebral cortex.

Brain Protection

  • The brain and spinal cord are protected by three membranes called meninges:
  • Dura mater: the tough, outermost sheet (Latin for "tough mother")
  • Arachnoid: the middle layer between the dura mater and pia mater that cushions the brain; (Latin for "spiderweb-like")
  • Pia mater: the delicate innermost layer. (Latin for "tender mother")

Brain Structures

  • Cerebral cortex: outermost layer of the brain; involved in higher-level processing.
  • Longitudinal fissure: separates the left and right cerebral hemispheres.
  • Frontal lobe: responsible for higher-level cognition and motor control.
  • Parietal lobe: responsible for processing spatial information.
  • Central sulcus: a fissure that divides the frontal lobe form the parietal lobe.
  • Temporal lobe: concerned with audition (hearing), olfaction (smell), and aspects of learning.
  • Sylvian (lateral) fissure: a deep fissure that separates the temporal lobe from the frontal and parietal lobes.
  • Occipital lobe: responsible for visual processing.
  • Precentral gyrus: primary motor cortex (movement control); anterior to the central sulcus.
  • Postcentral gyrus: primary somatosensory cortex (touch); posterior to the central sulcus.
  • Prefrontal cortex: cognitive control; regulates attention; problem solving.
  • Orbitofrontal cortex: decision making; influences emotional responses.
  • Auditory cortex: processing of auditory (sound) stimuli.
  • Broca's area: speech production.
  • Wernicke's area: language comprehension.
  • Cingulate gyrus: helps regulate emotion and pain
  • Corpus callosum: nerve fiber tracts that connect the two cerebral hemispheres.
  • Fornix: aids in the recall of episodic memory.
  • Thalamus: the sensory "relay" station; sends sensory information to the cortex.
  • Hypothalamus: homeostasis, hunger/thirst, body temperature; controls the pituitary.
  • Pineal gland: secretory gland that releases melatonin.
  • Superior colliculus: paired gray matter structures that receive visual information.
  • Inferior colliculus: paired gray matter structures that receive auditory information.
  • Midbrain: integrates sensory information; helps respond to sound.
  • Pons: breathing and heart rate; sleep and dreaming.
  • Medulla: breathing, heart rate, blood pressure.
  • Cerebellum: regulation of movement, coordination, balance, and posture.
  • Olfactory bulbs: provide receptors for smell.
  • Optic chiasm: point where two optic nerves meet; directs visual stimuli.
  • Mammillary bodies: aid in long-term memory consolidation.

Basal Ganglia

  • Structures within the basal ganglia are important for motor control and movement.
  • Caudate nucleus: motor planning; integrates spatial information with motor behavior.
  • Putamen: involved in the general execution of all movements.
  • Globus pallidus: controls conscious and proprioceptive awareness/movements.
  • Substantia nigra: "black substance" modulates movement; produces dopamine.
  • Subthalamic nucleus: involved in motor impulse control and stopping movements.

Limbic System

  • The limbic system is comprised of structures important for emotion, memory, and cognition.
  • Amygdala: regulates emotion (fear and aggressive behavior).
  • Hippocampus: facilitates learning and memory.
  • Stria terminals: controls autonomic, neuroendocrine, and behavioral responses.
  • Septal nuclei: plays a role in pleasure, reward, and reinforcement.

The Ventricular System

  • The ventricles of the brain are interconnected cavities filled with cerebrospinal fluid (CSF).
  • The CSF is produced in the choroid plexus - cells surrounding blood vessels in the ventricles.
  • Functions of CSF include:
    • Circulating nutrients to the brain.
    • Removing waste from the brain.
    • Serving as a cushion and shock absorber for the brain.
  • Structures within the ventricular system:
    • Lateral ventricles: circulates nutrients to the brain and removes waste.
    • Third ventricle: produces and secretes CSF.
    • Interventricular foramen: contains the choroid plexus.
    • Cerebral aqueduct: canal that connects the third and fourth ventricles.
    • Fourth ventricle: main cushion and shock absorber for the brain.

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Description

Explore the fundamental components of the nervous system in this quiz. Learn about the divisions of the central and peripheral nervous systems, including their structures and functions. Test your knowledge on the somatic, autonomic, and enteric nervous systems.

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