Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

30 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
These roots only cantain sensory fibers, which conduct nerve impulses form the periphery into the central nervous system.
Posterior or dorsal roots
front and back
Each posterior root also has a swelling which contains the cell bodies of sensory neurons.
posterior or dorsal root ganglion
Contains axons of motor nuerons which conduct impulses from the CNS to effector organs and cells
Anterior or ventral root
front or back
Two grooves penetrate the white matter of the spinal cord and divide it into right and left sides
Anterior median fissure and the posterior median sulcus
Deep wide groove on the anterior side of the spinal cord
anterior median fissure
shallow narrow groove on the posterior surface of the spinal cord
posterior median sulcus
back middle pouting
forms the cross bar of the H shaped gray matter of the spinal cord
Gray commissure
In the center of the gray commissure is a small space called the ____ _____
Central canal
extends the entire length of the spinal cord
Anterior to the gray commissure; connects the white matter of the right and left sides of the spinal cord
Anterior white commissure
below cross bar of H shape
Gray matter on each side of the spinal cord is subdivided into regions called ______
of a bull
These horns contain cell bodies of somatic motor neurons and motor nuclei.
Anterior (ventral) gray horns
back of spinal cord facing front (ventral) side of body
Contain somatic and autonomic sensory nuclei
Posterior (dorsal) gray horns
front of spinal cord facing back side of body
Between the anterior and posterior gray horns; contain cell bodies of autonomic motor neurons that regulate activity of smooth muscle, cardiac muscle and glands only in thoracic, upper lumbar, and sacral segments of the cord
lateral gray horns
The anterior and posterior gray horns divide the white matter into three broad areas called:
anterior, posterior, and lateral white _____
Each column, in turn, contains distinct bundles of nerve axons having a common origin or destination and carrying similar information. These bundles are called
Tracts; Sensory (ascending tracts);motor (descending tracts)
Consist of axons that conduct nerve impulses toward the brain.
Sensory (ascending) tracts
going up
Tracts consisting of axons that carry nerve impulses down the cord.
Motor descending tracts
going down to motivate
The white matter tracts in the spinal cord are highways for:
nerve impulse conduction
3 words
Sensory information from receptors travels up the spinal cord to the brain along two main routes on each side of the cord the _______ _______ and ______ ______
spinothalamic tracts and posterior columns
a tract and a column
These two tracts convey impulses for sensing pain, temperature, deep pressure and crude poorly localized sense of touch
spinothalamic tracts
begins in the spinal region;ends in the thalamus region
These columns carry nerve impulses for awareness of movement; fine touch; two point touch discrimination; pressure and vibration
posterior columns
back side not a track
Most regulation of involuntary activities of smooth muscle, cardiac muscle and glands by the autonomic nervous system originates in the ?
brain stem and hypothalamus
2 parts
superficial gray matter of the cerebrum that plays a major role in controlling precise, voluntary muscular movements
Cerebral cortex
convey nerve impulses that originate in the cerebral cortex and are destined to casuse precise, voluntary movements of skeletal muscles
Direct pathways
convey nerve impulses from the brain stem and other parts of the brain that are destined to program automatic movements, help coordinate body movements with visual stimuli, maintain skeletal muscle tone and posture
Indirect pathways
The distal end of a sensory neuron (dendrite); It respond to specific stimulus by triggering one or more nerve impulses in the sensory neuron.
Sensory receptor
receives stimulus
The nerve impulses propagate along the axon of the sensory neuron to the axon terminals which are located in the gray matter of the spinal cord or brain stem
Sensory receptor
A reflex pathway having only one synapse in the cns
monosynaptic reflex arc
Impulses triggered by the integrating center propagate out of the cns along a motor neuron to the part of the body that will respond.
Motor neuron
The part of the body tht responds to the motor nerve impulse, such as a muscle or gland.