SNP Flashcards
What is the role of the SYSTÈME NERVEUX PÉRIPHÉRIQUE?
It connects different parts of the body to the central nervous system via nerves.
What is a NERF?
A nerve is an organ that circulates information between the central nervous system and various regions of the body.
What are the main components of nerves?
Nerves are primarily composed of axons from several neurons.
What are NERFS CRÂNIENS?
Twelve pairs of cranial nerves emerge from the brain: 10 from the brainstem and 2 from the cerebrum.
What are NERFS RACHIDIENS?
The 31 pairs of spinal nerves are attached to the spinal cord, connecting it to various organs of the body.
Quels sont les trois types de nerfs?
Nerf sensitif, nerf moteur, nerf mixte.
Quelle est la fonction d’un nerf sensitif?
Achemine l’information provenant des récepteurs sensoriels jusqu’au système nerveux central.
Quelle est la fonction d’un nerf moteur?
Transmet les commandes du système nerveux central aux glandes ou aux muscles, afin de produire des mouvements volontaires ou involontaires.
Quelle est la fonction d’un nerf mixte?
Assume les fonctions tant des nerfs sensitifs que des nerfs moteurs.
Que sont les récepteurs sensoriels?
Des cellules nerveuses spécialisées qui captent les stimuli externes et internes, et les transforment en influx nerveux.
Où se trouvent principalement les récepteurs sensoriels?
Dans les organes des sens.
Qu’est-ce qu’un récepteur sensoriel?
Un neurone qui capte les stimuli et les transforme en influx nerveux.
What is a voluntary movement?
A voluntary movement is governed by thought and involves the passage of nerve impulses through the cerebral cortex.
What is an involuntary movement?
An involuntary movement, or reflex, occurs without conscious thought and does not pass through the cerebral cortex.
What is a reflex?
A reflex is an involuntary movement that can be categorized into two types based on the organ involved.
What is a reflex autonomous?
A reflex autonomous is associated with the action of vital organs or glands, with nerve impulses passing through the brainstem.
What is a reflex somatic?
A reflex somatic is associated with the action of skeletal muscles, where nerve impulses typically pass through the spinal cord without reaching the brain.
What is an arc reflex?
An arc reflex is the pathway taken by nerve impulses during a reflex.
How does the arc reflex function in emergencies?
The arc reflex allows for quick reactions in emergencies, with the brain analyzing the event only after the reaction occurs.
What happens when an insect stings you?
When an insect stings, you swat it away without thinking, and the sensation of pain is felt only a fraction of a second later.
Why do reflexes occur quickly?
Reflexes occur quickly because the information received is processed directly by the spinal cord or brainstem, bypassing the cerebral cortex.
