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50 terms

Milady- Nerves

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Sensory or Afferent Nerves
Carries impuleses or messages from the sense organs to the brian, where sensations of touch, cold, heat, sight, hearing , taste, smell, pain, and pressure are experienced.
Motor - Efferent
Which carry impulses from the brain to the muscles. The transmitted impulses produce movement.
Reflex
Is an automatic nerve reaction to a stimulus that involves movement of an impulse from a sensory receptor along the afferent nerve to the spinal cord, and a reponsive impulse along an efferent neuron to a muscle, causing a reation.
Nervous System
Is an exceptionally well-organized system that is responsible for coordinating all the many activities that are performed by the body. There are over 100 billion nerve cells, know as neurons, in the body.
1. Brain 2. Spinal Cord 3. Nerves.
What are three principal components of the nervous system?
1. CNS 2. PNS
What are the two main subdivisions of the nervous system.
Central Nervous System
What does the spinal cord and brain make up? Also, is the primary control for the whole nervous system.
Peripheral (PNS)
Controls the involuntary muscles, such as the glands, blood, vessels, and heart. (outter part of the body to the CNS)
Automic (ANS)
(Internal) Causes the internal regulations of impulses from the CNS to smooth muscle such as heart, blood vessels and glands.
Brain
is the largest, most complex nerve tissue in the body.
12
The number of pairs of crainial nerves orginate in the brain.
31
The number of pairs of spinal nerves extend from the spinal cord.
Neuron
Another name for a nerve cell.
Axon
Sends nerve impulses away from the cell body to other neurons, glands, and muscles.
Dendrite
Receives nerve impulses from other neurons.
Motor - Efferent
Nerve carries impulses from the brain to the muscles.
Sensory - Afferent
Nerve carries impulses from the sence organs to the brain.
Reflex
An example of pulling your hand quickly away from a hot stove.
Fifth Cranial Nerve
Also known as the trifacial or trigeninal nerve.
1. Opthalmic. 2. Mandibular. 3. Maxillary.
Name the three branches of the trifacial or trigeminal nerve.
Infraorbital
Affects the skin of the lower eyelid, side of the nose, upper lip and mouth.
Supratrochlear
Affects the skin between the eyes and upper side of the nose.
Mental
Affects the skin of the lower lip and chin (upper jaw)
Auriculotemporal
Affects the external ear and skin above the temple, up to the top of the skull.
Zygomatic
Affects the muscles of the upper part of the cheek.
Infratrochlear
Affects the membrane and skin of the nose.
Supraorbital
Affects the skin of the forehead, scalp, eyebrow, and upper eyelid.
Nasal
Affects the point and lower side of the nose.
Temperal Nerve
Affects the muscles of the temple, side of the forehead, eyebrow, eyelid, and upper part of the cheek.
Cervical
Affects the side of the neck and platysma muscle.
Mandibular
Affects the muscles of the lower lip and chin.
Buccal
Affects the muscles of the mouth.
Zygomatic
Affects the muscles of the upper part of the cheek.
Posterior Auricular
Affects the muscles behind the ear at the base of the skull.
Smaller Occipital
Affects the scalp and muscles behind the ear.
Greater Auricular
Affects the face, ears, neck and parotid gland.
Greater Occipital
Affects the scalp as far up as the top of the head.
Cervical Cutaneous Nerve
Affects the front and sides of the neck as far down as the breastbone.
Digital Nerve
Sensory motor nerve that, which its branches, supplies the fingers.
Radial Nerve
Is a sensory-motor nerve that, with its branches, supplies the thumb side for the arm and back of the hand.
Median Nerve
Is a smaller sensory-motor nerve than the ulnar and radial nerves; which its branches, its supplies the arm and hand.
Ulnar Nerve
is a senory-motor nerve that, with its branches, affects the little-finger side of the arm and palm of the hand.
Cerebralspinal Systems
Another name for Central Nervous System.
Sympathetic Division
stimulates or speeds up activity adn prepares the body for stressful situations.
Parasympathetic Division
operates under normal nonstressful conditions and helps restore and slow down activity, thus keeping the balance in the body.
Cerebrum
Makes up the bulk of the brain. It is the cerebral cortex, in the part of the cerebrum from which most messages from the brain are sent - such as those conveying thought, hearing and sight.
Diencephalon
Is located in the uppermost part of the midbrain had has two main parts: Thalamus and hypothalamus.
Thalamus
Located in the upper part of the diencephalon, acts as a relay station for sensory impulses and play a role in the recognition of pain and temperature in teh body.
Hypothalamus
Located in the lower part of the diencephalon, controls many bodily functions such as body temperature; it also controls the pituitary gland.
Brain Stem
Connects the spinal cord. Consist of three parts - Midbrain, Pons, and Medulla Oblongata; all which connects parts of the brain with the spinal cord. The brain stem is involved in regulating such vital functions as breathing, heartbeat, and blood pressure.