Nervous system Flashcards
(28 cards)
Somatic
Pertaining to body wall structures
Visceral
Pertaining to organs and other structures found in the body cavities
Tract
Bundle of axons in the CNS
Ganglion
Collection of neurons located outside of the CNS
Somatic division
Voluntary (Motor and Sensory)
List steps of Somatic Motor Pathway
1) Originate Anterior Horn 2) Travel Anterior Root 3) At Spinal nerve; split to Posterior ramus (intrinsic back muscles) or Anterior ramus
List steps of Somatic Sensory Pathway
1) Originate in body travel through either posterior ramus or anterior ramus 2) Gather in Posterior root ganglion 3) Travel along posterior root into posterior horn
Dermatome
Strips of skin innervated by single spinal nerve
Myotome
Muscle segments innervated by single spinal nerve
Identify this pathway
Sympathetic Innervation to Body Wall
Identify black arrow
White ramus communicans
Identify red arrow
Gray Ramus Communications
What nerve travels from paravertebral ganglion to visceral structures of thorax in sympathetic innervation?
Cardiopulmonary Splanchnic N
Where does sympathetic innervation initiate?
Lateral horn (IML Column)
List sympathetic innervation pattern for head/neck region
- Lateral horn
- Synapse in paravertebral ganglion
- Ascend sympathetic chain
- Hitchhike on other nerves and/or blood vessels headed to target region
Does sympathetic innervation to thorax area synapse in paravertebral ganglia?
Yes; then travel on cardiopulmonary splanchnic nerves
Does sympathetic innervation to visceral structures in abdomen/pelvis area synpase in paravertebral ganglion?
No; it passes through paravertebral ganglion and travels on abdominopelvic splanchnic nerves
Where does sympathetic innervation to visceral structures in abdomen/pelvis area synapse?
Prevertebral ganglion
Sympathetic innervation to visceral structures in abdomen/pelvis travel on what nerves?
abdominopelvic nerves
Where do prevertebral ganglion lie in relationship to vertebral column?
Anterior to vertebral column
In sympathetic innervation to visceral structures in abdomen/pelvis; post synaptic nerve fibers will follow what to target organs? What is this called?
Arteries; periarterial plexus
Where do parasympathetic pathways to head/neck originate?
Cranial Nerves 3, 7, 9, 10
Where do parasympathetic pathways to thorax/abdomen originate?
Cranial Nerve 10 (vagus nerve)
Where does parasympathetic innervation to Hindgut, pelvis originate?
Splanchnic nerves from S2-S4
