Types of P.N. and General Flashcards
How many cranial nerves arise from the brain?
11.
In the PNS a sensory nerve is also known as…
Afferent fibers.
What is the descriptive name of the cranial nerve which arises from the upper cervical spinal cord?
Spinal accessory nerve.
Spinal nerves arise from the cord as…
Anterior and posterior rootlets.
What is the unilateral area of skin innervated by the fibers of a single spinal nerve called?
Dermatome.
Visceral motor fibers send impulses to…
Smooth muscle, cardiac muscle, and glandular tissue.
Name 3 functionally different modalities of the nerve fibers that innervate skeletal muscles.
Somatic efferent, branchial efferent, and visceral efferent.
Name the four functional modalities of nerve fibers carried by the facial nerve.
Branchial efferent, general afferent, visceral efferent, and special sensory.
In general how many neurons are involved in a consecutive somatic motor pathway?
2.
The lower motor neurons are embedded in the ___ forming the nuclei of origin.
Brain stem.
The lower motor neuronal bodies are located in the ___ of the spinal cord as nuclei of origin.
Anterior grey columns.
In general where are the secondary sensory cranial nuclei of termination?
Dorsal grey matter of brain stem.
The secondary sensory neurons decussate and project to the ___.
Thalamus.
Tertiary sensory neurons are in the ___.
Ventral thalamic nucleus.
What part of the internal capsule carries the tertiary sensory neuronal axons to the postcentral gyrus?
Posterior limb.
Branchial efferent cranial nerves arise from ___.
Nucleus of origin.
What neuronal type is for the primary sensory neurons?
Pseudounipolar.
Name the patent openings for the four visceral efferent cranial nerves.
Superior orbital fissure, internal acoustic meatus, and jugular foramen.
Describe the superficial or apparent origin of cranial nerve VI.
Dorsal aspect of the pons.
