Human nervous system - Vestibulocochlear, CN VIII, 8

human nervous system

Table of Contents

Introduction
Human nervous system interactive
Prenatal and postnatal development of the human nervous system
- Neuronal development
- Morphological development
- Postnatal changes
Anatomy of the human nervous system
- The central nervous system
  - The brain
    - Cerebrum
      Lobes of the cerebral cortex
      Cerebral ventricles
      Basal ganglia
    - Brainstem
      Epithalamus
      Thalamus
      Hypothalamus
      Subthalamus
      Midbrain
      Pons
      Medulla oblongata
    - Cerebellum
  - The spinal cord
    - Cellular laminae
    - Ascending spinal tracts
      Dorsal column
      Spinothalamic tracts
      Spinocerebellar tracts
    - Descending spinal tracts
      Corticospinal tract
      Rubrospinal tract
      Vestibulospinal tract
      Reticulospinal tract
      Autonomic tracts
- The peripheral nervous system
  - Spinal nerves
    - Structural components of spinal nerves
    - Functional types of spinal nerves
    - Cervical plexus
    - Brachial plexus
    - Lumbar plexus
    - Sacral plexus
    - Coccygeal plexus
  - Cranial nerves
    - Olfactory nerve (CN I or 1)
    - Optic nerve (CN II or 2)
    - Oculomotor nerve (CN III or 3)
    - Trochlear nerve (CN IV or 4)
    - Trigeminal nerve (CN V or 5)
      Ophthalmic nerve
      Maxillary nerve
      Mandibular nerve
    - Abducens nerve (CN VI or 6)
    - Facial nerve (CN VII or 7)
    - Vestibulocochlear nerve (CN VIII or 8)
    - Glossopharyngeal nerve (CN IX or 9)
    - Vagus nerve (CN X or 10)
    - Accessory nerve (CN XI or 11)
    - Hypoglossal nerve (CN XII or 12)
- The autonomic nervous system
  - Sympathetic nervous system
    - Sympathetic ganglia
    - Neurotransmitters and receptors
  - Parasympathetic nervous system
  - Enteric nervous system
Functions of the human nervous system
- Receptors
- Reflex actions
- Movement
  - Sensory receptors
    - Tendon organs
    - Muscle spindles
  - Basic organization of movement
    - Stretch reflexes
    - Reciprocal innervation
    - Posture
  - Lower-level mechanisms of movement
  - Higher-level mechanisms of movement
    - Cerebral hemispheres
    - Cerebellum
    - Basal ganglia
- The vestibular system
  - Sensory receptors
    - Saccule and utricle
    - Semicircular canals
  - Nerve supply
  - Vestibular functions
    - Vestibulo-ocular reflex
    - Conscious sensation
- Functions of the autonomic system
  - The eye
  - The urinary system
  - The reproductive system
  - The endocrine system
  - The cardiovascular system
    - Reflex pathways
    - Vasopressin and cardiovascular regulation
- Pain
  - Theories of pain
  - Lower-level pain pathways
    - Tissues
    - Peripheral nerves
    - Spinal cord
  - Higher-level pain pathways
    - Brain
    - Central pain
    - Referred pain
    - Changes in the cerebral cortex
- Perception
  - General organization of perception
  - Vision
  - Hearing
- Emotion and behavior
  - Emotion
  - The defense reaction
  - Mating
  - Urination and defecation
  - Eating and drinking
  - Temperature regulation
  - Reward and punishment
  - Circadian rhythms
- Higher cerebral functions
  - Analytical approaches
  - Hemispheric asymmetry, handedness, and cerebral dominance
  - Language
  - Memory
  - Executive functions of the frontal lobes

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This cranial nerve has a vestibular part, which functions in balance, equilibrium, and orientation in three-dimensional space, and a cochlear part, which functions in hearing. The functional component of these fibers is special somatic afferent; they originate from receptors located in the temporal bone. Vestibular receptors are located in the semicircular canals of the ear, which provide input on rotatory movements (angular acceleration), and in the utricle and saccule, which generate information on linear acceleration and the influence of gravitational pull. This information is relayed by the vestibular fibers, whose bipolar cell bodies are located in the vestibular (Scarpa) ganglion. ...(100 of 37287 words)

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