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Questions and Answers
Match the following parts of the brain with their corresponding orientation:
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:
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:
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:
Match the following components of the Enteric Nervous System (ENS) and their characteristics:
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Match the following views of the brain with their descriptions:
Match the following views of the brain with their descriptions:
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Match the following brain structures with their primary functions:
Match the following brain structures with their primary functions:
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Match the following types of brain matter with their descriptions:
Match the following types of brain matter with their descriptions:
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Match the following lobes of the brain with their primary functions:
Match the following lobes of the brain with their primary functions:
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Match the following membranes with their characteristics:
Match the following membranes with their characteristics:
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Match the following structures with their anatomical descriptions:
Match the following structures with their anatomical descriptions:
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Match the following cortex areas with their functions:
Match the following cortex areas with their functions:
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Match the following cortex regions with their notable features:
Match the following cortex regions with their notable features:
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Match the following areas with their respective contributions:
Match the following areas with their respective contributions:
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Match the following divisions of the nervous system with their primary functions:
Match the following divisions of the nervous system with their primary functions:
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Match the following components of the Peripheral Nervous System with their characteristics:
Match the following components of the Peripheral Nervous System with their characteristics:
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Match the following functions with the appropriate systems:
Match the following functions with the appropriate systems:
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Match the following systems with their primary focus:
Match the following systems with their primary focus:
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Match the following descriptions with the proper nervous system components:
Match the following descriptions with the proper nervous system components:
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Match each type of nerve with its characteristic region:
Match each type of nerve with its characteristic region:
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Match the following nervous system responses with their correct descriptions:
Match the following nervous system responses with their correct descriptions:
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Match the following functions to the respective nervous system components:
Match the following functions to the respective nervous system components:
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Match the following brain structures with their primary functions:
Match the following brain structures with their primary functions:
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Match the following parts of the ventricular system with their descriptions:
Match the following parts of the ventricular system with their descriptions:
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Match the brain structures with their roles in motor control:
Match the brain structures with their roles in motor control:
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Match the following brain components with their associated functions:
Match the following brain components with their associated functions:
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Match the following components of the Limbic System with their functions:
Match the following components of the Limbic System with their functions:
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Match the following structures with their secretory functions:
Match the following structures with their secretory functions:
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Match the following structures with their specific characteristics:
Match the following structures with their specific characteristics:
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Match the following areas with their role in memory and learning:
Match the following areas with their role in memory and learning:
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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.