Peripheral Nervous System Flashcards
Located one of the two main parts of the nervous system, the other part is the central nervous system (CNS).
outside of the brain and spinal
control your body voluntary movement helps to control body posture.
Ganglia
likes a cables that carry electrical impulse between your brain and rest your body.
Nerves
Its main function is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body.
Peripheral Nervous System
is one of two main parts of your body’s nervous system.
Peripheral Nervous System
feeds information into your brain from most of your senses. It carries signals that allow you to move your muscles.
Peripheral Nervous System
act as the communication network connecting your brain and spinal cord (Central Nervous System ) to the rest of your body.
Peripheral Nervous System
is that part of your nervous system that lies outside your brain and spinal cord.
Peripheral Nervous System
It plays key role in both sending information from different areas of your body back to your brain, as well as carrying out commands from your brain to various parts of your body.
Peripheral Nervous System
consists of two main parts: your central nervous system and your peripheral nervous system. Your central nervous system includes two organs, your brain and spinal cord.
Nervous System
central nervous system includes two organs:
brain and spinal cord
everything else and includes nerves that travel from your spinal cord and brain to supply your face and the rest of your body.
Peripheral Nervous System
from the greek word that means around or outside the center.
Peripheral
Our peripheral nervous system has two main subsystems:
Autonomic and somatic
these are nervous system processes your brain runs automatically and without you thinking about them.
Autonomic
These are functions you manage by thinking about them.
Somatic
This part of the peripheral nervous system that stimulates skeletal muscle under our conscious control is called the?
Somatic Nervous System
Some activities in this system are spinal reflexes, are involuntary.
Somatic Nervous System
are extremely rapid such that they involve the spinal cord and the PNS but not the brain.
Spinal Reflex
There is one part of the peripheral nervous system that is not under the direct control of your conscious mind. This part controls body activities that are involuntary.
autonomic nervous system
nerves of the autonomic nervous system can be further divided into two groups:
Parasympathetic Division and Sympathetic Division.
is actually most active under normal conditions.
Parasympathetic division
dominates in times of physical or emotional stress or whenever the body requires some action.
Sympathetic division
It controls the “fight-or-flight” response that you experience when talking in front of an audience or taking a surprise quiz.
Sympathetic division
these nerves carry information to your brain and spinal cord.
Sensory
They either connect directly to your brain through your cranial nerves or carry information to your spinal nerves, which then feed into your spinal cord.
Sensory
spinal cord are on the back of your spinal cord.
sensory nerve connections
these nerves carry command signals from your brain to various parts of your body. They only carry information away from your brain.
Motor
are on the front of your spinal cord; meaning, these nerves are for sending muscle movement commands only.
motor nerve connections
Responsible for all voluntary skeletal and somatic movement such as moving the leg.
Motor
these nerves control the automatic functions of the organs and systems in your body.
Autonomic
often involve mixed nerve fibers, some of which carry commands from your brain to their destination, and others that carry information about an organ’s function back to your brain.
Autonomic Nerves
which is a part of your peripheral nervous system, helps your brain control all of the vital organs in your body. That also helps your brain care for itself.
Autonomic Nervous System
also relays nerve signals from those organs to your brain.
Peripheral Nervous System
located outside of the central nervous system
Peripheral Nervous System
The PNS located outside of the?
central nervous system
there are 12 pairs of nerves that connect directly to your brain, and they emerge directly from the brain primarily the brain stem.
Cranial nerves
They transmit sensory and motor information between the brain and various part of head ,neck and torso.
Cranial nerves
They are like essential functions like sight, smell, taste, hearing and balance, facial expression, eye movement and swallowing
Cranial nerves
there are 31 pairs of this, categorized into cervical, thoracic, lumbar, sacral and coccygeal regions.
Spinal Nerves
THEY TRANSMIT SENSORY INFORMATION LIKE (TOUCH ,PAIN AND TEMPERATURE ) FROM THE BODY TO SPINAL CORD
Spinal nerve function
They carry motor commands from spinal cords to muscle enabling movement
Spinal Nerve Function
LIKE THE WIRES THAT CONNECT YOUR BODY TO SPINALCORD ALLOWING YOU TO FEEL SENSATIONS AND MOVE YOUR MUSCLES
Spinal Nerve function
Olfactory
Only
One
Optic
Of
Oculomotor
The
Trochlear
Two
Trigeminal
Athletes
Abducens
Felt
Facial
Very
Vestibulocochlear
Good
Glossopharyngeal
Victorious
Vagus
And
Accessory
Healthy
Hypoglossal
are the cells that send and relay signals through your nervous system, using both electrical and chemical signals.
Neurons
this is the main part of the cell.
Cell body
this is a long, arm-like part that extends outward from the cell body.
Axon
At the end of the axon are several finger-like extensions where the electrical signal in the neuron becomes a chemical signal.
Synapses
Lead to nearby nerve cells
Synapses
these are small branch-like extensions (their name comes from a Latin word that means “tree-like”) on the cell body.
Dendrites
Are the receiving point for chemical signals from the synapses of other nearby neurons.
Dendrites
are part of the circuit that connects sensory organs, like those that detect pain or touch, in the peripheral nervous system to the brain
Synapses
this is a thin layer composed of fatty chemical compounds.
Myelin
surrounds the axon of many neurons and acts as a protective covering.
Myelin
Insulating layer, or sheath that forms around nerves, including those on the brain and spinal cord.
Myelin
It is made up of protein and fatty substances. This allows electrical impulses to transmit quickly and efficiently along the nerve cells.
myelin sheath
is a layer of delicate connective tissue around the myelin sheath of each myelinated nerve fiber.
Endoneurium
nerve fibers are bundled together into groups known as fascicles, each surrounded by a protective sheath known as the?
Perineurium
is the outermost layer of dense irregular connective tissue surrounding a peripheral nerve.
Epineurium
There are 3 different types of neurons:
Multipolar neurons
Bipolar neuronsone axon
Pseudo unipolar neurons
one axon, many dendrites
Multipolar Neurons
one axon, one dendrite
Bipolar Neurons
one process that branches in two
Pseudounipolar neurons
These neurons contain a number of dendrites and one axon. They are the most common type of neurons and they can be found more or less anywhere in the nervous system.
Multipolar Neurons
in the cerebral cortex
Pyramidal Neurons
In the cerebellum
Purkinje Neurons
in the anterior horn of the spinal cord
Motor Neurons
have only two process that connect to the cell body: one dendrite and one axon.
Bipolar Neurons
are only found in specific areas of the nervous system
Bipolar Neurons
Bipolar Neurons are only found in specific areas of the nervous system that in the?
In the retina
In the nose (receptors of the olfactory epithelium)
can be found in the spinal ganglions.
Pseudounipolar Neurons
This process is structurally similar to that of an axon, but it can receive information as well.
Pseudounipolar Neurons
There is only one process that branches into two
Pseudounipolar Neurons
