Flashcards in Spinal 2 Exam 4 Wk 2 Deck (38):
Branchial efferent fibers conveyed in the tenth cranial nerve will innervate what target organs(s)?
Muscles of the soft palate; constrictor muscles of the pharynx; cricothyroid muscle and palatoglossus muscle.
What is the nucleus of origin for preganglionic parasympathetic efferent fibers conveyed in the tenth cranial nerve
The dorsal vagal nucleus.
Postganglionic parasympathetic efferent fibers of the of the tenth cranial nerve are distributed to which target organs?
Smooth muscle of the trachea, bronchi, pharanx, esophagus, stomach, small intestine, colon (to the splenic flexure), and heart as well as to the liver and pancreas.
What is the location of primary afferent neurons of the tenth cranial nerve whose peripheral processes are associated with general somatic sensation from the posterior cranial dura?
Jugular ganglion or superior vagal ganglioin
Peripheral processes of pseudounipolar neurons associated with general visceral sensation are carried in the tenth cranial nerve to what location?
The nodose ganglion or inferior vagal ganglion.
Central processes of pseudonuipolar neurons associated with general visceral sensation are carried in the tenth cranial nerve to synapse at what location?
The cardiorespiratory nucleus of the nucleus solitarius.
What is/are the target organs(s) monitoring blood pressure or blood physiology supplied by the tenth cranial nerve?
Aortic body or aortic glomus and the aortic arch.
The cranial root of the eleventh cranial nerve is annexed by which nerve?
The vagus nerve
What is unique about the eleventh cranial nerve?
It is the only cranial nerve to originate, in part, from the spinal chord and it is the only cranial nerve to be associated with the foramen magnum.
Branches of the twelfth cranial nerve provide somatic efferent innervation to which extrinsic muscle of the tongue?
Genioglossus muscle, styloglossus muscle, and hyoglossus muscle.
Peripheral processes from sensory receptors in the dura mater f the posteior cranial fossa will be conveyed from the twelfth cranial nerve to what nerve?
The ventral ramus of the first cervical nerve.
In the spinal nerve pathways, where is the cell body of a primary afferent neuron located?
The dorsal nerve root ganglion.
What name is given to the generic location for efferent neurons associated with spinal nerves?
Ventral horn or lateral horn.
What are the primary neuronal projections observed in a nerve?
Peripheral sensory processes and motor nerve fibers.
Contrast the sensory/afferent ganglion with the motor/efferent ganglion.
Sensory/afferent ganglia contain pseudounipolar, primary sensory neurons and lack synapses. Motor/efferent ganglia contain multipolar, secondary motor neurons and always demonstrate synapses.
What primarily forms the dorsal horn?
Secondary sensory neurons
Waht par of the primary afferent neuron will be located in each of the five parts of the peripheral nerve system as stressed in class?
Peripheral sensory process – mixed spinal nerve, ventral primary ramus/division, dorsal primary ramus/division. Central sensory process – dorsal nerve root
What are the divisions of the peripheral nerve system based on the type of target cell innervated?
Somatic division and the visceral/autonomic/involuntary division.
What skeletal muscles are innervated via the ventral primary rami/divisions?
All muscles of the neck, trunk, extremities, abdominal parietal wall, & pelvic parietal wall with the exception of muscles innervated by cranial nerves IX, X, XI in the neck and splenius, erector spinae, transversospinalis, suboccipital, interspinalis & levator consarum.
What is the function of the enteric nerve system?
Control of motility, exocrine and endocrine secretions, microcirculation and regulation of the immune and inflammatory process of the gastrointestinal tract.
What are the primary enteric plexuses?
Myenteric plexus of Auerbach and the submucosal plexus of Meissner.
Other than gangila or plexuses, in what additional location will neural crest cells associated with the sympathetic division be located?
The superior cervical ganglion is the result of fusion of which paravertebral ganglia?
C1-C4 paravertebral ganglia
The stellate ganglion is the result of fusion of which paravertebral ganglia?
C7, C8, T1 paravertebral ganglia
What are the names of he most consistent prevertebral ganglia?
Celiac ganglion, superior mesenteric ganglion and inferior mesenteric ganglion.
Which of the prevertebral nerve plexuses are more likely to contain secondary sympathetic neuron cell bodies?
Cardiac plexus, pulmonary plexus, celiac plexus, and inferior hypogastric (pelvic) plexus.
Based on the target cell innervated, what are the classifications given to postganglionic sympathetic efferent fibers?
Vasomotor fiber, pilomotor fiber, sudomotor fiber and secretomotor fiber
What rami will communicate with the paravertebral ganglia?
White rami communicans, gray rami comminucans, interganglionic rami communicans, and splanchnic nerves
What is the common sympathetic neuronal pathway?
The part of the sympathetic pathway from the spinal cord level of origin to the paravertebral ganglion which corresponds to that cord level of origin.
What is the termination of the horizontal sympathetic neuronal pathway?
Smooth muscle or glandular tissue in the parietal wall of the thorax and upper abdomen; territory roughly corresponding to the T1-T12, L1-L2 dermatomes
What is the termination of the ascending sympathetic neuronal pathway?
Smooth muscle or glandular tissue in the head, neck, and upper extremity.
What is the termination of the descending sympathetic neuronal pathway?
Smooth muscle or glandular tissue in the parietal wall of the lower abdomen, pelvis and lower extremety.
Upper and lower extremities are Innervates with sympathetically exclusively derived from which ramus or division?
Ventral primary ramus.
What is the termination of the splanchnic/visceral sympathetic neuronal pathway?
Smooth uncle or glandular tissue in the organs and blood vessels often thorax, abdomen and pelvis.
In the splanchnic pathway, what is the location of synapse of the pre ganglionic sympathetic efferent fiber?
In a prevertebral ganglion or paravertebral plexus.
What is the cord level origin of the sympathetic neuronal pathway to the head?
Upper thoracic spinal chord levels, T1-T2 tipically.
Where will preganglionic sympathetic efferent fibs synapse in the pathway to the heart?
1. Paravertebral ganglia of origin from T1-T4,T5
2. Any cervical paravertebral ganglion
3. The cardiac plexus