5.7 Peripheral and Autonomic Nervous System Flashcards
Types of nerve fiber which is myelinated, with motor and sensory function
Type A nerve fiber
Type of nerve fiber which is thinly myelinated, mainly preganglionic autonomic, with some pain and temperature perception
Type B nerve fiber
Type of nerve fiber which is unmyelinated, with sensory functions of pain and temperature
Type C nerve fiber
What is the convergence of anterior and posterior nerve roots within or just proximal to the intervertebral foramen; consists of both motor and sensory nerve fibers
Spinal nerve
One of the two rami of a spinal nerve which is characterized to be larger, consisting mostly of motor fibers, supplying most of the body except head and back
Ventral ramus
One of the two rami of a spinal nerve which is characterized to be the smaller branch, carrying sensory fibers, and supplying nerve fibers to the synovial joints of the vertebral column, deep muscles of the back, and overlying skin
Posterior (dorsal) ramus
What is formed by sensory fibers connecting with the motor fibers via an interneuron
Reflex arc
Impact of lesions which is caused by disruption of sensory (afferent) neurons
Paresthesia
Impact of lesions which is caused by disruption of motor (efferent) neurons
Paralysis
Impact of lesions which is caused by disruption of spinal nerve
Both paresthesia and paralysis
Impact of lesions which is caused by disruption of dorsal ramus
Back paresthesia and paralysis of deep back muscles
Unilateral cutaneous sensory territory of a single spinal nerve
Dermatome
Dermatomal area of nipple, umbilicus
T4T10
Unilateral muscle mass innervated by a single spinal nerve
Myotome
___ is the mixing of nerves from different cord levels by union and division of bundles
Plexus formation
Cranial nerves with afferent/sensory fibers
PURELY Sensory: 1,2,8Mixed: 5,7,9,10
Cranial nerves with efferent/motor fibers
PURELY Motor: 3,4,6,11,12Mixed: 5,7,9,10
Cranial nerves carrying parasympathetic innervation
3,7,9,10
Disorder on this cranial nerve can cause anosmia or loss of smell
CN I: Olfactory
Disorder on this cranial nerve can cause anopsias or visual defects
CN II: Optic
Disorder on this cranial nerve can cause eye paralysis, diplopia, or ptosisControls constriction of pupils and ciliary muscles for near vision
CN III: Oculomotor
Only cranial nerve that arises from the dorsal side of the brain
CN IV: Trochlear
The biggest cranial nerve; transmits sensory information from the face and motor information to muscles of mastication
CN V: Trigeminal
Only cranial nerve to extend beyond head and neck
CN X: Vagus
Cranial nerve that innervate the intrinsic and extrinsic muscles of the tongue; for swallowing, speech, and food manipulation
CN XII: Hypoglossal
True or false: Somatic nerve fibers have only 1 neuron form the ventral horn cells to the effector organs and are lightly myelinated
False. Somatic nerve fibers are heavily myelinated
True or false: Preganglionic neurons of autonomic nerve fibers are unmyelinated with postganglionic neurons are lightly myelinated.
False. Preganglionic neurons are LIGHTLY MYELINATED. Postganglionic neurons are UNMYELINATED.
Location of preganglionic cell bodies of:a.) sympathetic nerve fibersb.) parasympathetic nerve fibers
sympathetic: thoracolumbarParasympathetic: craniosacral
Relative lengths of neurons of:a.) sympathetic nerve fibersb.) parasympathetic nerve fibers
sympathetic: short preganglionic neuron, long post ganglionic neuronparasympathetic: long preganglionic neuron, short postganglionic
The short preganglionic neurons of sympathetic division releases ___
acetylcholine which is excitatory (+)
the long postganglionic neurons of sympathetic divisions release ___
Norepinephrine and acetylcholine
Cranial nerve controlling the parotid gland
CN IX: Glossopharyngeal
