Test Flashcards
The spinal cord extends to about what vertebral level?
L2 (conus medullaris)
What makes up white matter?
Anterior horn (Front door) Motor impulses
What makes up gray matter?
Posterior horn (Back door) Sensory Impulses
Impulses enter the body anteriorly or posteriorly?
Posteriorly
Impulses leave the body anteriorly or posteriorly?
Anteriorly
The anterior horn is composed of what type of impulses?
motor
The posterior horn is composed of what type of impulses?
sensory
A group of myelinated nerve fibers that run up and down are called?
Tracts
Tracts are sensory or motor (Never mixed)
True or False?
True
Describe upper motor neurons
CNS only (Brain and Spinal Cord)
Describe lower motor neurons
PNS only (Peripheral nerves)
Which nerves branch or divide forming a plexus?
Lumbar or cervical
In an individual who has lost the ability to oppose the thumb, what nerve is involved? What is this condition called?
Median nerve (ape hand)
In an individual who has lost the ability to pick up the toes (ankle dorsiflexion) what nerve is involved? What is this condition called?
Peroneal nerve (food drop)
Claw hand involves the loss of what muscle group? What nerve is involved?
Intrinsics and the nerve involved is the ulnar nerve
If a person had a spinal injury at L4, what type of motor neuron lesion would it be consider?
Lower MN
Cranial nerve I does what?
Olfactory (Smell)
Cranial nerve II does what?
Optic (Sensory Vision)
Cranial nerve III does what?
Oculomotor (Muscles of the eye, straight up and down, pupil constriction)
Cranial nerve IV does what?
Trochlear (Muscles of the eye down and lateral)
Cranial nerve V does what?
Trigeminal (Gives touch to 3 branches Maxillary, Forehead, Mandibular)
Cranial nerve VI does what?
Abducens (Muscles of the eye/ Peripheral vision)
Cranial nerve VII does what?
Facial (Muscles of facial expression
Cranial nerve VIII does what?
Vestibulocochlear/ Auditory (Hearing and Equilibrium)
Cranial nerve IX does what?
Glossopharyngeal (Taste in back 1/3 of tongue)
Cranial nerve X does what?
Vagus (Nerve from brain to stomach; speech)
Cranial nerve XI does what?
Spinal Accessory (Sternocleidomastoid and trapezius muscles and swallowing) (Turns head and raises shoulder)
Cranial nerve XII does what?
Hypoglossal (Muscles of the tongue)
What is the function of the CNS?
Command/ Control all systems
What is the function of the PNS?
Communication
What is the parasympathetic system responsible for?
Rest and Digest
What is the sympathetic system responsible for?
Fight or Flight
The fundamental unit of the nervous system are?
Neurons
Axons carry impulses _________.
Out (Away)
Dendrites carry impulses ____
To
Lobe responsible for muscle control, problem solving, personality, thinking and speech.
Frontal Lobe
Lobe responsible for reflexes, special orientation, and sensory integration.
Parietal
Lobe responsible for visual.
occipital