Exam 3 Chapter 14 Flashcards
List 2 examples of general somatic sensations
- touch
- pain
List 1 example of a special visceral sensation.
taste and smell
Do all nerves contain both sensory and motor fibers?
all spinal nerves have both sensory and motor
- some cranial nerves are exclusively sensory or primarily motor
Name the functional type of the sensory receptors that respond to painful stimuli. What is the structure of these receptors?
Nociceptors are free nerve endings
Are proprioceptors part of the somatic or visceral sensory system?
somatic sensory system
What type of stimulus do encapsulated receptors respond to?
pressure, discriminative touch, vibration, stretch
Which nerve is the great sensory nerve of the face?
trigeminal nerve (V)
Which nerve innervates the muscles of facial expression?
facial nerve (VII)
What deficits would result of a lesion that damaged the dorsal root of spinal nerve T4?
sensory deficits from the muscles and skin of the anterior and posterior trunk of T4 and rib 4
What deficits would occur if a lesion damaged the dorsal ramus of T4?
sensory and motor deficits in the skin and intrinsic back muscles in T4
What vertebra does the cervical nerve C5 exit from?
below C4
What vertebra does lumbar nerve L3 exit from?
below L3
Would a patient with a spinal injury at C5 be able to breathe independently?
Yes
What do baroreceptors monitor?
blood pressure
What is the large, onion-shaped pressure receptor in deep connective tissue called?
lamellar corpuscles
What receptor type is for pain, itch, and temperature receptors?
free nerve ending
What receptor type contains intrafusal fibers and flower spray endings?
muscle spindles
What receptor type has discriminative touch receptors in hairless skin?
tendon organs
What receptor type contains nerve endings wrapped around thick collagen bundles in a tendon?
tendon organs
What receptor type rapidly adapts deep-pressure mechanoreceptors?
lamellar corpuscles
What receptor type slowly adapts deep-pressure mechanoreceptors?
bulbous corpuscles
What cranial nerve innervates 4 extrinsic eye muscles?
oculomotor
What cranial nerve is the major sensory nerve of the face?
trigeminal
What cranial nerve innervates the sternocleidomastoid and trapezius?
accessory
What 3 cranial nerves are primarily or exclusively sensory?
olfactory, optic, vestibulocochlear
What cranial nerve innervates the tongue muscles?
hypoglossal
What cranial nerve allows chewing of food?
trigeminal
What cranial nerve is anesthetized during dental work?
trigeminal
What cranial nerve helps to regulate heart activity?
vagus
What cranial nerve is sensory innervation for hearing and equilibrium?
vestibulocochlear
What 4 cranial nerves contain parasympathetic motor fibers?
facial, glossopharyngeal, oculomotor, vagus
What cranial nerve innervates muscles of facial expression?
facial
What contains only motor fibers?
ventral root
What muscles are innervated by the musculocutaneous nerve?
coracobrachialis, biceps brachii, brachialis
Bronchial refers to the airways in the lungs. What does brachial refer to?
arm
Which muscles are innervated by the femoral nerve?
sartorius, iliacus, quadriceps femoris
What occurs in all of the mixed cranial nerves V, VII, IX, and X?
general somatic sensory and somatic motor to pharyngeal arch muscles
Sensory receptors are called encapsulated nerve endings. What is the capsule made of?
Connective tissue
Describe the roots to and the composition of a spinal nerve.
Roots come from spinal cord
- sensory and motor fibers
- dorsal (sensory) and ventral (motor) root
- merge to form mixed spinal nerve
Are dorsal and ventral roots in the CNS or the PNS?
PNS
Name the branches of a spinal nerve (besides the rami communicantes) and identify what basic region of the body each branch supplies.
Dorsal ramus: supplies deep muscles and skin of the posterior trunk
Ventral ramus: supplies anterior and lateral trunk and limbs
Name the nerve plexuses that serve the anterior thigh.
lumbar plexus
Name the nerve plexuses that serve the diaphragm.
phrenic nerve
Name the nerve plexuses that serve the perineum.
pudendal nerve
Name the nerve plexuses that serve the forearm.
brachial plexus
- median nerve
- ulnar nerve
- radial nerve
Name the nerve plexuses that serve the ankle.
lumbosacral plexus
