What nerve gives somatic motor innervation to the diaphragm and from what nerves does it arise?
Phrenic n.
Ventral branches of C5, C6, and C7 spinal nerves
Ventral branches of C5, C6, and C7 spinal nerves
What modality of nerve is no longer used and what category do the muscles now fall under?
SVE is no longer used.
They fall under GSE
They fall under GSE
Where are the pre-ganglionic neurons of the sympathetic nervous system located?
The T1-L5 region of the spinal cord.
Where are the post-ganglionic nerve cell bodies of the sympathetic nervous system located?
Cervical, thoracic or abdominal ganglia
What pre-ganglionic neurons carry parasympathetic nerves?
Cranial Nerves III, VII, IX, X. Also sacral region of the spinal cord.
What types of fibers are carried by the vagus nerve?
Sensory fibers from the pharynx, larynx, trachea, esophagus, thoracic and abdominal vescera.
Moter fibers to striated muscles of the pharynx
Visceral motor fibers to thoracic and abdominal organs
Moter fibers to striated muscles of the pharynx
Visceral motor fibers to thoracic and abdominal organs
Describe the course of the right recurrent laryngeal nerve
Vagus nerve-> Around right subclavian artery-> Cranially along trachea-> Larynx
Describe the course of the left recurrent laryngeal nerve from the vagus nerve.
Wraps around the ligamentum arteriosum/ aortic arch->Courses cranially along trachea-> Innervates larynx
What neurotransmitter is used between pre- and post-ganglionic neurons in the sympathetic and parasympathetic systems?
Acetylcholine
What neurotransmitter is used between the post-ganglionic neuron and the target organ in the parasympathetic system?
Acetylcholine
What is the neurotransmitter between the post-ganglionic neuron and the target organ in the sympathetic system?
Norepinephrine
What are the types of nerve fibers found in a spinal nerve?
Somatic motor
Somatic sensory
Visceral motor
Visceral sensory
Somatic sensory
Visceral motor
Visceral sensory
What are the three functions of the visceral motor system?
Maintain homeostasis
Respond to stress
Control involuntary action
Respond to stress
Control involuntary action
