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    Nervous System: Skull Cerebrospinal Fluid

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    Vincent Franciz T. Fernandez
    The nervous system consists of the brain, spinal cord, and nerves. It controls and coordinates functions throughout the body by sending and receiving signals. The central nervous system (CNS) processes information and includes the brain and spinal cord. The peripheral nervous system (PNS) carries signals between the CNS and body and consists of cranial and spinal nerves. The nervous system has two main divisions - the somatic nervous system which connects to voluntary muscles, and the autonomic nervous system which connects to involuntary functions like digestion.

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    Nervous System: Skull Cerebrospinal Fluid

    Uploaded by

    Vincent Franciz T. Fernandez
    58 views1 page
    The nervous system consists of the brain, spinal cord, and nerves. It controls and coordinates functions throughout the body by sending and receiving signals. The central nervous system (CNS) processes information and includes the brain and spinal cord. The peripheral nervous system (PNS) carries signals between the CNS and body and consists of cranial and spinal nerves. The nervous system has two main divisions - the somatic nervous system which connects to voluntary muscles, and the autonomic nervous system which connects to involuntary functions like digestion.

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    Nervous System Parts

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    The nervous system consists of the brain, spinal cord, and nerves. It controls and coordinates functions throughout the body by sending and receiving signals. The central nervous system (CNS) processes information and includes the brain and spinal cord. The peripheral nervous system (PNS) carries signals between the CNS and body and consists of cranial and spinal nerves. The nervous system has two main divisions - the somatic nervous system which connects to voluntary muscles, and the autonomic nervous system which connects to involuntary functions like digestion.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    58 views1 page

    Nervous System: Skull Cerebrospinal Fluid

    Uploaded by

    Vincent Franciz T. Fernandez
    The nervous system consists of the brain, spinal cord, and nerves. It controls and coordinates functions throughout the body by sending and receiving signals. The central nervous system (CNS) processes information and includes the brain and spinal cord. The peripheral nervous system (PNS) carries signals between the CNS and body and consists of cranial and spinal nerves. The nervous system has two main divisions - the somatic nervous system which connects to voluntary muscles, and the autonomic nervous system which connects to involuntary functions like digestion.

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    © All Rights Reserved
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    of 1

    Nervous System - consist of Pons, Medulla oblongata and

    - Controls and coordinates various boy Cerebellum


    functions. Pons
    - Sends signals and receive responses from o Connects the two hemispheres of the
    every organ body. cerebrum and cerebellum.
    Two Major Divisions: Medulla oblongata/ Brain Stem
    A. Central Nervous System (CNS) o Enlarged part of the spinal cord which
    - Processes the information it receives (or controls the breathing, swallowing,
    incoming signals) from the sensory nerves and digestion and action of the heart and
    sends out responding actions (outgoing blood vessels.
    signals). Cerebellum
    Two Parts of the CNS o Responsible for the coordination of the
    1. Brain voluntary muscle movements and
    - jelly-like tissue mass, weighing around 1.3-1.4 kg maintains body balance and posture
    containing staggering thousands of billions of neurons. 2. Spinal Cord
    - it is a nerve tissue that is protected by the vertebral
    - protected and enclosed by the skull.
    column that connects the brain to the nerves from all
    - immersed in the cerebrospinal fluid (CSF) in the
    over the body which is also controls the involuntary
    skull which serves as the cushion for the brain.
    movements called as reflexes.
    - protected by membrane covering called as
    meninges; Dura Mater (outer part); Arachnoid B. Peripheral Nervous System (PNS)
    (middle part) and Pia Mater (inner part) - Carries signals within the central nervous
    Meningitis - malfunction or disorder of meninges systems
    Three Regions of Brain - Consists of 12 pairs of motor and sensory
    1. Forebrain cranial nerves from the brain and 31 pairs of
    - consists of Cerebrum or Cerebral hemisphere, motor and sensory nerves from the spinal
    thalamus and hypothalamus cord.
    Cerebrum or Cerebral hemisphere Two Parts of the PNS
    o Largest portion of the brain which 1. Somatic nervous system
    controls the sensory functions, IQ, - connects the CNS to the voluntary muscles
    personality and understanding of - has two main parts: Spinal Nerves and Cranial Nerves
    language. Spinal Nerves
    o Divided into left and right hemispheres - nerves that carry motor and sensory
    which are connected by a structure signals between the spinal cord and
    called as Corpus callosum the body.
    o Each hemisphere is divided into four Cranial Nerves
    lobes: frontal, parietal, occipital and - nerve fibers that carry information
    temporal lobes. into and out of the brain stem.
    Frontal Lobe- for reasoning, 2. Autonomic nervous system
    higher cognitive skills, - connects the CNS to the glands, smooth muscles of
    movement and language. the different internal organs and cardiac muscles or
    Parietal lobe- for tactile (touch) the involuntary muscles.
    sensory information. Two Subdivisions of Autonomic Nervous System
    Occipital Lobe- for interpreting 1. Sympathetic nervous system
    information and visual stimuli. - functions when you are stressed,
    Temporal Lobe- for anxious or afraid of something.
    interpreting sounds and 2. Parasympathetic nervous system
    language. - functions to normalize and maintains
    Thalamus the bodily functions or in relax mode.
    o Process signals received from the sense
    organs before relaying them to the
    cerebrum and it sorts the signals
    coming from the sense organs.
    Hypothalamus
    o Controls body temperature, thirst,
    hunger, salt and water balance, and
    emotional behaviour.
    o Controls the production of various
    hormones.
    2. Midbrain
    - Also relays information from the sense organs.
    - Responsible for eye reflexes and regulates sleep.
    3. Hindbrain

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