Flashcards in Introduction Part II (Exam 1) Deck (50):
How many pairs of cranial nerves?
How many pairs of spinal nerves?
_____ efferent neurons innervate skeletal muscle.
_____ efferent neurons innervate cardiac muscle, smooth muscle, and gland.
Transmit signals from receptors to CNS.
____ located in the brain stem.
31 spinal nerves include:
8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal
Ends at L2 level.
Extends from the inferior end of spinal cord.
Spinal Nerve Root Afferent/Sensory
Spinal Nerve Root Efferent/Motor
Ventral Root (Anterior)
Region of skin innervated by sensory afferent fibers from an individual spinal nerve.
Group of motor muscles innervated by a spinal nerve.
Innervates the diaphragm.
Phrenic Nerve C3-5
5 Primary Nerves of the Brachial Plexus
Musculocutaneous (forearm flexors) , Axillary (Deltoid) , Radial (Wrist/Finger Extensors) , Median (Forearm Pronators, Wrist/Finger Flexors) , Ulnar (Flex, Abd/Add Fingers).
6 Nerves of Lumbosacral Plexus
Obturator (Hip Abd) , Femoral (Quads) , Superior Gluteal (Hip Abd, Glut Min, TFL), Inferior Gluteal (Glut Max), Common Peroneal (Peroneals, Ant .Tib (Deep), Tibial (Post. Tib, Flexor Dig Hall/Longus)
A simple, local interruption of conduction affecting the myelin only. (Hand Falling Asleep)
Nerves segments proximal to injury site degenerates back to the ___ Node of Ranvier it encounters.
Changes in nerve distal to injury.
Axons grow ___mm per day or ___ inch per month.
If cell body is destroyed?
Myelin can take ___ days to ___ year to reform.
10 days, 1 year.
Separated in L and R sides, connected by thick band of nerve fibers called?
Adheres to the brain. Thin, high vascularized. Houses Circle of Willis.
Thin web-like layer. Avascular.
Layer against the skull. Tough fibrous layer.
Allows communication between hemispheres.
Thought, Conscious, Motor Center, Language, Reasoning, Perception
Cerebral Cortex Functions
Four ventricles of brain contain.
Where is the CSF produced ?
____% are left hemisphere dominant.
95%, Right Handed
Masses of gray matter deep within the cerebrum.
Area where major sensory tracts and the visual/auditory pathways synapse.
Which nervous system includes cranial nerves, spinal nerves, and ganglia?
Primary Motor Cortex
Responsible for speech.
Broca's Area (Frontal Lobe)
Primary Sensory Cortex
Judgement, Awareness, Attention, Thinking, Aggression, Mood, Abstract
Understanding, Read, Hear
Wenicke's Area (Temporal Lobe)