Nervous System Flashcards
nervous system 1
responsible for coordinating actions performed by the body
nerves 1
fine fibres every square inch of the body
neurons 2
nerve cells
100billions
neurology1
Scientific study of structure, function and pathology of nervous system
divisions of the nervous system 3
Central nervous system
peripheral nervous system
autonomic nervous system
central nervous system: what are the parts (4) and function (4)
brain, spinal cord, spinal nerves, cranial nerves
controls consciousness
mental activities,
involuntary functions of 5 senses,
all voluntary muscle actions (movement and facial movement)
peripheral Nervous System: contains (2) and function (2)
sensory and motor nerves
connects peripheral (outer) parts of body to central nervous system
carries impulses/messages to and from central nervous system
autonomic nervous system: parts (1) and (5)
controls the involuntary muscles
regulates action:
smooth muscles
glands
blood vessels
heart
breathing
brain 4
largest and most complex mass of nerve tissue
contained in cranium
controls sensation , muscles and glandular activity
sends and receives messages through 12 pairs of cranial nerves reaching various parts of head, face, and neck
brain stem 2
connects spinal cord to brain
involved in regulating vital functions ; breathing, heart beat and blood pressure
spinal cord 3
continuation of brain stem- originating in brain
extends to lower extremity of body
protected by spinal column
how many spinal nerves are there 1
31 pairs distributed to muscles and skin of trunk and limbs
nerves 3
whitish cords made of bundle of nerve fibres held together by connective tissue
where impulses are transmitted
originate in brain and spinal cord and branches to all parts of the body
types of nerves 2
sensory nerves
motor nerves
sensory nerves 3
carry impulses/messages from sense organs to brain where sensations are experienced
receptors
impulses pass through sensory nerves, to brain and back through motor nerves to muscle as complete circuit= muscle movement
motor nerves 2
carries impulses from brain to muscles/glands
produce movement
reflex 1
automatic nerve reaction to stimulus that involves movement of an impulse from sensory receptor to spinal cord and responsive impulse along motor neuron to muscle - causing reaction
nerves of head face and neck
12 pairs of cranial nerves from bse of brain and brain stem
activate the muscles and sensory structure of head an neck, skin a, membrane, eyes and ears
what cranial nerves are esthticians most concerned with
V, VII, XI and their several branches
5th cranial nerve 5
aka trifacial/trieminal nerve
largest of cranial nerves
chief sensory nerve sensory nerve of face
has branches of motor nerves that control chewing
has branches effected by lymphatic massage
nerves controlling chewing 4
3 branches of 5th cranial nerve
ophthalmic nerve
mandibular nerve
maxillary nerve
ophthalmic nerve 6
affects skin of; forehead, upper eyelids,
and interior portion of the scalp, orbit, eyeball and nasal passage
mandibular nerves 2
affects muscle of chin and lower lip
maxillary nerves 1
affects upper part of face
auruiculotemporal nerves
affects the external ear and skin above temple up to top of skull
infraorbital nerve 4
affects the skin of lower eyelid, side of nose, upper lip, and mouth
infratochlear nerve 1
affects membrane and skin of the nose
mental nerve 2
affects skin of lower lip and chin
nasal nerve 1
affects the point and lower side of the nose
supraorbital nerve 4
affects the skin of forehead, scalp, eyebrow, and upper eyelid
supratrochlear nerve 1
affects the skin between eyes and upper side of nose
zygomatic nerve 1
affects muscles of the upper part of the cheek
seventh cranial nerve 4
aka facial nerve
chief motor nerve of face
emerges near lower part of the ear and extends to muscle of he neck
branches and divisions control muscles of facial expressions and secretions of saliva
parts of seventh cranial nerve 6
buccal nerve
cervical nerve
mandibular nerve
posterior auricular nerve
temporal nerve
zygomatic nerve
buccal nerve 1
affects muscles of mouth
cervical nerves1
affects side of the neck and platysma muscle
mandibular nerves 1
affects the muscles of the chin and lower lip
posterior auricular nerves 1
affects the muscles behind the ear at base of skull
temporal nerve 5
affects muscles of temple, side of forehead, eyebrow, eyelid, upper part of cheek
zygomatic nerve 1
affects the muscles of the upper part of the cheek
eleventh cranial nerve 3
aka accessory nerve
motor nerve controlling motion of neck and shoulder muscles
affected during facials and massage
cervical nerve branches 5
supply muscles and scalps at back of head and neck
cervical cutaneous muscles
greater auricular nerve
greater occipital nerve
smaller occipital nerve
cervical cutaneous nerve 2
located at side of neck
affects front and sides of neck as far down as breast bone
greater auricular nerves 5
located at side of neck,
effects the face, ears, neck, and parotid gland
greater occipital nerve 2
located at back of head
affects scalp as far up as top of head
smaller occipital nerve 2
located at base of skull
affects scalp and muscles behind ear
nerves of arm and hand 4
digital nerve
radial nerve
median nerve
ulnar nerve
digital nerve 2
sensory motor nerve
supplies fingers
radial nerve 2
sensory motor nerve
supplies thumb side of arm and back of hand
median nerve 2
sensory motor nerve smaller than radial and ulnar
supplies arm and hand
ulnar nerve 2
sensory motor nerve
supplies little finger and palm of hand
vagus nerve 3
located in abdominal cavity
autonomic nervous system
overreaction to trigger can lower blood pressure- fainting
parts of neuron 3
dendrites - receive messages
synapse - junction one to the next
axon - long extending from nerve - transmit messages
