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Cortiva - APP 121 - Q2 - Lesson 2
Flashcards & Quiz for lesson 2 of APP 121
58
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Undergraduate 1
01/28/2011

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Term
Spinal Cord function
Definition
The link between the PNS (Peripheral Nervous System) and the brain
Term
Spinal Cord structure
Definition
Contained within the vertebrae, from the foramen magnum to L-2; central canal surrounded by grey matter and an outer layer of white matter
Term
SC - Grey Matter
Definition
Unmyelinated "H" shape, with a Dorsal Horn, and a Ventral Horn
Term
SC - White Matter
Definition
Myelinated; contains ascending and descending tracts
Term
Dorsal Horn
Definition
Sensory grey matter up and down the dorsal portion of the spinal cord
Term
Ventral Horn
Definition
Motor grey matter up and down the ventral portion of the spinal cord
Term
Ascending Tract
Definition
The portion of the spinal cord which carries sensory information to the brain
Term
Descending Tract
Definition
The portion of the spinal cord which carries motor information from the brain
Term
Central Canal
Definition
Portion of the spinal cord; cerebrospinal fluid flows through here.
Term
Spinal Cord Segments
Definition
Sections of the spinal cord between each set of nerve roots (not the vertebrae, but the cord)
Term
Cauda Equina
Definition
"Horse's Tail"; bundle of nerves from L1 or L2 down, extending from the end of the spinal cord
Term
Meninges
Definition
System of membranes that envelope the CNS (central nervous system) for protection. Consists of the dura mater, arachnoid mater, and pia mater.
Term
Simple Reflex
Definition
Rapid, uncomplicated automatic response involving few neurons
Term
Spinal Reflex
Definition
Primal protective reflexes that do not require brain input; occurs during Contract/Relax
Term
Stretch Reflex
Definition
Muscle is stretched and responds by stretching; a spinal reflex (such as a knee jerk); stimulates the muscle spindle cells to contract the muscle
Term
Tendon Reflex
Definition
A type of stretch reflex involving the golgi tendon organs, which respond by relaxing the muscle
Term
Reflex - Effects of Massage
Definition
Relax muscles, mental clarity, reduce pain, normalize system function
Term
Reflex Arc
Definition
A pathway where an impulse is received, goes to the CNS (central nervous system), and sends a reflexive response.
Term
Reflex Arc - 5 parts
Definition
Receptor, Sensory (afferent) Neuron, Integration center, Motor (efferent) neuron, Effector; "R-SIME"
Term
Receptor
Definition
Distal end of a dendrite that receives a stimulus; examples: golgi tendon organ, muscle spindle cells (called proprioceptors)
Term
Sensory (afferent) Neuron
Definition
A neuron that takes the nerve impulse to the spinal cord
Term
Integration Center
Definition
The role of the spinal cord in the Reflex Arc
Term
Motor (efferent) Neuron
Definition
A neuron that takes the nerve impulse from the spinal cord
Term
Effector
Definition
Any tissue or organ that carries out a nervous system command
Term
Spinal Nerves (Amount)
Definition
31 pairs at 31 spinal segments
Term
Spinal Segments
Definition
31: 1 Coccyx; 5 Sacral; 5 Lumbar; 12 Thoracic; 8 Cervical
Term
Dorsal Root
Definition
Sensory; attach to the spinal cord
Term
Ventral Root
Definition
Motor; attach to the spinal cord
Term
Cervical Nerves
Definition
Numbered according to the vertebrae above
Term
Thoracic Nerves
Definition
Numbered according to the vertebrae below
Term
C8
Definition
The one spinal nerve with no corresponding vertebrae
Term
Plexus
Definition
Branching out and recombining of spinal nerves into peripheral nerves
Term
Cervical Plexus
Definition
C1 - C5; innervates the neck & shoulders
Term
Brachial Plexus
Definition
C6 - T1; innervates the arms
Term
Lumbosacral Plexus
Definition
T12-S5; innervates the lower extremities
Term
Dermatome
Definition
Skin segment innervated by a spinal nerve
Term
Myotome
Definition
Muscle innervated by a spinal cord segment
Term
Enterotome (or, Viscerotome)
Definition
Organ innervated by a spinal cord segment
Term
Sclerotome
Definition
Area of bone, cartilage or ligament innervated by a spinal segment
Term
Autonomic Nervous System
Definition
A division of the Peripheral Nervous System; involuntary, controls smooth and cardiac muscle; has 2 divisions: Sympathetic & Parasympathetic
Term
Sympathetic Nervous System
Definition
Fight or flight; active; emergency; thoracolumbar output; widespread & long lasting effects
Term
Parasympathetic Nervous System
Definition
Rest & digest; craniosacral output; slow body processes; localized & short term effects
Term
Dual Innervation
Definition
Autonomic effectors receive input from both divisions (Sympathetic & Parasympathetic) at all times, but to different degrees
Term
Trigger Point
Definition
Local tenderness; ischemic tissue; hyperfacilitated reflex arcs; referred pain; sarcolemma damage
Term
Tender Point
Definition
Local tenderness; ischemic tissue; hyperfacilitated reflex arcs; caused by gamma pain hyperfacilitated muscle spindle cell activation
Term
Contract/Relax
Definition
PNF technique; stimulation of the golgi tendon organ reflex that inhibits the agonist
Term
Reciprocal Inhibition
Definition
PNF technique; stimulation of antagonist golgi tendon organ that inhibits contraction in agonist
Term
Bell's Palsy
Definition
Temporary flaccid paralysis of the facial nerve; inability to control facial muscles
Term
Nerve Compression (Etiology)
Definition
Herniated disc; arthritis w/ bone spur; tumor; taut connective tissue; tight muscles
Term
Nerve Compression (Signs/Symptoms)
Definition
Paresthesia (abnormal sensation); motor weakness & atrophy
Term
Cervical Plexus Compression (Signs/ Symptoms)
Definition
Headache; neck pain; difficulty breathing
Term
Cervical Plexus Compression (Causes)
Definition
Vertebral subluxation; disc protrusion; forward head posture
Term
Brachial Plexus Compression (Signs/ Symptoms)
Definition
Paresthesia (abnormal sensation) & weakness of upper extremities
Term
Brachial Plexus Compression (Causes)
Definition
Vertebral misalignment; tight axillary connective tissue; whiplash; shoulder trauma; tight muscles
Term
Thoracic Outlet Syndrome
Definition
Group of distinct disorders that affect the nerves in the brachial plexus
Term
Carpal Tunnel Syndrome
Definition
Nurovascular compression; median nerve is compressed at the wrist; leads to pain, paresthesia, & muscle weakness in forearm & hand
Term
Lumbosacral Plexus Compression (Signs/ Symptoms)
Definition
Paresthesia and weakness in lower quadrant
Term
Lumbosacral Plexus Compression (Causes)
Definition
Vertebral misalignment; tight connective tissue; tight muscles (sciatic nerve pain)
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