Peripheral nervous system Flashcards
What special senses can the sensory functions be divided?
Vision
Touch
Pain in the face
The motor function is subdivided into two
somatic motor
Parasympathetic motor
The function of somatic motor nerves
The somatic motor cranial nerves innervate the skeletal muscles in the head and neck
The function of parasympathetic cranial nerves
The parasympathetic cranial nerves innervate the glands, smooth muscle throughout the body, and cardiac muscle of the heart.
What nerve function does the trigeminal nerve have?
Sensory and Somatic motor function
What nerve function does the oculomotor nerve have?
Somatic motor and parasympathetic
What are the nerves that are considered to have a sensory function only?
The olfactory
Optic
Vestibulocochlear nerves
What nerves are considered to have a somatic motor only
The trochlear
abducens
accessory
hypoglossal
What are the nerves that have all three functions?
facial
glossopharyngeal
vagus
What nerve is probably the most important parasympathetic nerve in the body?
The Vagus nerve
Why are the spinal nerves called the mixed nerves
All spinal nerves contains axons of both sensory and somatic motor neurons
What is the area of skin supplied with sensory innervation by a pair of spinal nerves.
Derma-tome
What are the three major plexuses
Cervical plexus - C1 to C4
Brachial plexus - C5 to T1
Lumbosacral plexus - L1 to S4
What supplies motor innervation to the muscles of the pelvic floor and sensory cutaneous innervation to the skin over the coccyx
Coccygeal plexus
The tibial and common fibular nerves are bound together within a connective tissue sheath and together are called
The sciatic nerve
