Spinal Cord and Spinal Nerves Anatomy and Physiology Study Guide
This guide provides a comprehensive overview of the spinal cord and spinal nerves, covering their anatomical structures, protective layers, internal composition, and functional roles in sensory and motor pathways. It also details reflex mechanisms and the sympathetic nervous system's involvement. Essential for understanding the central and peripheral nervous system's integration.
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Nervous System Organization and Tissue Structure
Sympathetic Division and Autonomic Pathways
The sympathetic division, or thoracolumbar division, utilizes preganglionic and postganglionic neurons to provide autonomic innervation via sympathetic trunk ganglia, splanchnic nerves, and the adrenal medulla.
- Sympathetic division
- Thoracolumbar division
- Preganglionic neuron cell bodies
- Lateral horns
- White and gray communicantes
- Sympathetic trunk
- Paravertebral ganglia
- Prevertebral ganglia
- Cervical sympathetic ganglia
- Sympathetic splanchnic nerves
- Celiac, superior mesenteric, and inferior mesenteric ganglia
- Epinephrine and norepinephrine release
The Sympathetic Division of the Autonomic Nervous System
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Nervous System Organization and Sensory Receptors
The nervous system is organized into structural and functional divisions including the central nervous system, peripheral nervous system, sensory nervous system, and motor nervous system.
- Central Nervous System
- Peripheral Nervous System
- Sensory (afferent) nervous system
- Motor (efferent) nervous system
- Somatic sensory
- Visceral sensory
- Somatic motor
- Autonomic motor
- Sensory receptors
- Sensation
- Transducers
- Receptive fields
- Tonic receptors
- Phasic receptors
- Sensory adaptation
- Exteroceptors
- Interoceptors
- Proprioceptors
- Chemoreceptors
- Thermoreceptors
Nervous Tissue and Organization
This content explores glial cells, myelination processes, nerve connective tissue, and synaptic communication within the central and peripheral nervous systems.
- Glial cells
- Astrocytes
- Ependymal cells
- Microglial cells
- Oligodendrocytes
- Satellite cells
- Schwann cells
- Saltatory conduction
- Continuous conduction
- Axon regeneration
- Endoneurium
- Perineurium
- Epineurium
- Synapses
- Electrical synapses
- Chemical synapses
- Neurotransmitters
Anatomy and Physiology of Spinal Structures and Neurons
Spinal Cord and Spinal Nerves Anatomy
The spinal cord links between the brain and the rest of the body through spinal nerves that serve as pathways for sensory and motor impulses.
- Spinal cord regions
- Cervical part
- Thoracic part
- Lumbar part
- Sacral part
- Coccygeal part
- Spinal nerves
- Conus medullaris
- Cauda equina
- Filum terminale
- Spinal meninges
Anatomy and Physiology of the Spinal Cord and Spinal Nerves
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Spinal Cord Structure and Reflex Arcs
This content details the spinal meninges, spinal cord anatomy, gray and white matter organization, and the mechanisms of reflex arcs and spinal nerve distribution.
- Spinal meninges
- Dura mater
- Epidural space
- Subdural space
- Subarachnoid space
- Cerebrospinal fluid
- Pia mater
- Denticulate ligaments
- Gray matter
- White matter
- Funiculus
- Sensory pathways
- Motor pathways
- Anterior and posterior horns
- Afferent and efferent fibers
- Reflex arc
- Monosynaptic reflex
- Polysynaptic reflex
- Stretch reflex
- Withdrawal reflex
Spinal Nerves and Nerve Plexuses
This content covers the anatomy of spinal nerves, intercostal nerves, and major nerve plexuses including the cervical plexus.
- Intercostal nerves
- Subcostal nerve
- Nerve plexus
- Cervical plexus
- Lumbar plexus
- Sacral plexus
- Phrenic nerve
- Cutaneous branches
- Motor branches
Nervous Tissue, Dermatomes, and Tactile Receptors
This lecture covers clinically significant types of pain, dermatomes, and various encapsulated and unencapsulated tactile receptors.
- Phantom pain
- Phantom limb syndrome
- Referred pain
- Dermatomes
- Tactile receptors
- Encapsulated receptors
- Unencapsulated receptors
- Free nerve endings
- Root hair plexuses
- Tactile discs
- Lamellated corpuscles
- Tactile corpuscles
- Bulbous corpuscles
- End bulbs
- Phasic receptors
- Tonic receptors
Cytology and Classification of Neurons
This lecture covers the cytology of nervous tissue, including the structural and functional classification of neurons.
- Neurons
- Axon collaterals
- Terminal arborizations
- Dendrites
- Unipolar neurons
- Bipolar neurons
- Multipolar neurons
- Anaxonic neurons
- Sensory neurons
- Motor neurons
- Interneurons
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