Nervous system Flashcards
(25 cards)
What is the nervous system?
The network of nerve cells and fibres which transmits nerve impulses throughout the body.
The nervous system is made up of:
- brain
- Spinal cord
- All the nerves of the body
Functions of the Nervous System:
- Memory/ learning
- Voluntary control movement
- Stimulates every tissue and organ within the body
2 Main parts of the nervous system:
- Central nervous system
- Peripheral nervous system
The Central Nervous System is composed of:
The brain and the spinal cord
The function of the Central Nervous System:
- Control boy movements
- Information Processing
( The brain control mostly everything )
2 kind of tissue in the CNS:
Grey and white matter
Grey Matter
Home to neural cell bodies, axon terminals, and dendrites, as well as all nerve synapses. Located on the surface of the brain.
White matter
Composed of myelinated axons. Located in the inner layer of the brain’s cortex.
The function of the white matter:
Conduct, process, and send nerve signals up and down the spinal cord.
The function of the grey matter:
Process info in the brain
What’s the Peripheral Nervous System?
Nervous system outside of the brain and the spinal cord (CNS).
The Peripheral Nervous System is composed of:
The cranial nerves (nerves of the head) and spinal nerves.
The function of the PNS:
Serves as the communication system between the body and the CNS.
The function of the brain:
- Maintaining Homeostasis
- Interpreting sensory info
- Creating motor responses( movement )
- Learning
- Thinking
- Talking, etc.
Brain Components:
- Forebrain “Prosencephalon”
- Hindbrain “Rhombencephalon”
- Cerebrum
- Brainstem
- Midbrain”Mesencephalon”
- Pons
- Medulla Oblongata
- Cerebellum
- Myelin Sheath
- Sulci and Gyri
Region of the developing vertebrate brain.; It has 2 major parts; the telencephalon, which contains the cerebral hemispheres, the diencephalon, which contains the thalamus, hypothalamus, epithalamus, and subthalamus.
Forbrain “Prosencephalon”
Region of the developing vertebrate brain that is composed of the medulla oblongata, the pons, and the cerebellum.
Hindbrain “Rhombencephalon”-
The largest part of the brain. It contains the right and left hemispheres called the Cerebral hemispheres. The two hemispheres are divided by a groove called the interhemispheric fissure or “longitudinal fissure.”
Cerebrum
The hemispheres of the cerebrum are divided into lobes:
Frontal, Parietal, Temporal, and Occipital lobes.
The distal part of the brain that is made up of the midbrain, pons, and medulla oblongata. It connects the cerebrum to the spinal cord. One of the most important parts of the entire CNS.
Brainstem
Bundle of nerve tissue that connects the left and right hemispheres of the brain.
- Contains over 200 million axons
- Allows the hemispheres to communicate and send signals to each other.
Corpus Callosum
The small central part of the brainstem.
Connects the hindbrain and the forebrain. Composed of the tectum and tegmentum.
Midbrain “Mesencephalon”
Part of the brainstem that links the medulla oblongata and the thalamus.
Sits directly above the medulla oblongata. Lies between the midbrain and medulla.
Pons
