Autonomic Nervous System and Nerves of Thorax Flashcards
_____________ receive axons of sensory (________) neurones
Dorsal horns** receive axons of sensory (**afferent) neurones
_________ send out the axons of motor(____) neurons
Ventral horns –send out the axons of motor(_efferent_) neurons
A mass of nerve cell bodies (plus dendrites/synapses) associated with nerves of PNS
Ganglia
dorsal root ganglia (spinal ganglia) = cell bodies of ___________
dorsal root ganglia (spinal ganglia) = cell bodies of sensory neurons
Autonomic ganglia = cell bodies of ___________
Autonomic ganglia = cell bodies of autonomic neurons
_____________ nerves innervate skeletal (voluntary) muscles
Somatic: innervate skeletal (voluntary) muscles
___________ : innervate smooth and cardiac (involuntary) muscles and glands
Visceral (autonomic): innervate smooth and cardiac (involuntary) muscles and glands
___________roots contain mainly sensory (afferent) neurones (plus ganglion)
Dorsal (posterior) roots contain mainly sensory (afferent) neurones (plus ganglion)
_____________roots contain mainly motor(efferent) neurones
Ventral (anterior) roots contain mainly motor(efferent) neurones
____________ pre-ganglia are SHORT with LONG post-ganglionic
Sympathetic pre-ganglia are SHORT with LONG post-ganglionic
____________ pre-ganglia are LONG with SHORT post-ganglionic originating from ganglia ___________
Parasympathetic** pre-ganglia are LONG with SHORT post-ganglionic originating from ganglia **near/on target tissue
Sympathetic Division formed by neurons from ______________ (__________ outflow)
Structure of Sympathetic Division formed by neurons from spinal nerves T1 to L2 (thoracolumbar outflow)
Sympathetic neuron cell bodies located in _________ and leaves via ____________
Sympathetic neuron cell bodies located in lateral horn; leaves via ventral root
Pre-ganglionic sympathetic neurons pass into sympathetic chain via ________________
Pre-ganglionic sympathetic neurons pass into sympathetic chain via white ramus communicantes (myelinated)
Post-ganglionicsreturn to spinal nerve via ______________ to target blood vessels, sweat glands, erector pili associated with nerve
Post-ganglionicsreturn to spinal nerve via grey ramus communicantes to target blood vessels, sweat glands, erector pili associated with nerve
________________: Sympathetic neurons branch from spinal nerves to form inter-connected ganglia
sympathetic chain: Sympathetic neurons branch from spinal nerves to form inter-connected ganglia
Sympathetic Innervation of Heart acts to increase heart rate, force of contraction
__________________: Can result from damage to the ipsilateral sympathetic trunk
•Associated with:
–Miosis (constricted pupil)
–Partial ptosis (weak, droopy eyelid)
–Anhydrosis (decreased sweating)
Horner’s Syndrome: Can result from damage to the ipsilateral sympathetic trunk
•Associated with:
–Miosis (constricted pupil)
–Partial ptosis (weak, droopy eyelid)
–Anhydrosis (decreased sweating)
Parasympathetic Division formed by neurons in ___________ and in _______ nerves (________ outflow)
Parasympathetic Division formed by neurons in cranial nerves (III, VII, IX, X) and in some sacral (S2-S4) nerves (craniosacral outflow)
In the ______________ nervous system ganglia are usually near or within the walls of the target organ
In the Parasympathetic nervous system ganglia are usually near or within the walls of the target organ
In the Parasympathetic nervous system ganglia are usually near or within the walls of the target organ
The _____________ nervous system has no mass activation –organs individually activated
The Parasympatetic nervous system has no mass activation –organs individually activated
Motor components of the Vagus Nerve?
smooth muscle
cardiac muscle (to slow heart rate)
abdominal viscera
_______________is responsible for general sensation from:
–Central diaphragm
–Pleura
–Pericardium
Phrenic Nerve is responsible for general sensation from:
–Central diaphragm
–Pleura
–Pericardium
