Wk 4 Central Nervous System Flashcards
What does the cerebrum do
It identifies information gathered by all yo organs, and controls thinking, memory, speaking and movement
The brain can be divided into three major portions, what are they?
Cerebrum
Cerebellum
Brainstem
Is the cerebellum the largest part of the brain, true or false?
Falseeee
Did I trick ya? It’s the cerebrum that is the largest part and it also contains sensory motor and associated areas
Each hemisphere is divided into different lobes which are separated by sulci, can you tell me the 3 lobes
Frontal
Temporal
And occipital
What hemisphere receives sensory information and sends motor commands to the opposite side of the body?
Cerebral
Which hemisphere contains general interpretive speech centre and is responsible for language based skills. Left or right
To the left to the left
And it’s also important for mathematical calculations and logical decision making
The right hemisphere analyses sensory information and relates it to what
Smells, touch, taste, sight (face recognition)
What does the frontal lobe contain, control and receive?
Contains primary motor cortext
Which control dos somatic motor neurons and the
Gusta(me gusta)Tory cortex receives sensory information from the taste receptors
Which lobe contains the auditory and olfactory cortex which receives information about hearing and smell
Temporal
What does the parietal lobe contain
The primary sensory cortext which receives data from somatic receptors such as touch, taste, vibration, pressure, pain and temperature.
What does the diencephalon contain
The thalamus and hypothalamus
The hypothalamus is the relay and processing central for sensory information
True or false
False
It’s the thalamus
The hypothalamus centre controls emotions, automatic functions and hormone production.
Why is the hypothalamus important
It controls automatic functions such as regulating blood pressure, heart rate, breathing and digestion
And it coordinates the nervous and endocrine system by releasing regulatory hormones that affect the anterior pituitary
What is the brain stem composed of
Mesencephalon
Pons
Medulla onlongata
Mesencephalon (mid brain) contains centres that help maintain _______ and _____
Consciousness and alertness
The midbrain contains ______ that process visual and auditory information and controls reflexes triggered by these stimuli
Nuclei
Pons in Latin means…..
Bridge!
The nuclei in pons is involved with what controls
Somatic and visceral motor control - control of breathing for example
What does VMC stand for and what it do
Vasomotor centre VMC and it regulates distribution of blood flow through the peripheral tissues
The _____ _________ relays sensory information to the thalamus and to the centres in other parts of the brain stem from spinal and cranial nerves.
Medulla oblongs ta
How is our delicate brain tissue protected from mechanical forces
Cranial bones, meninges and csf
Meninges are made up of three layers what are they
Dura mater -outer layer (lines da bone )
Arachnoid mater- middle layer
Pia mater -inner layer which lines brain and spinal cord
How does blood reach the brain
Via internal carotid arteries and vertebral arteries; and leaves the brain via internal jugular vein which drains the dural sinuses
Explain the BBB blood brain barrier
BBB isolates neural tissue from general circulation
Limits the entry of many drugs into the brain
What are the spinal cord functions
Transmits info up and down CNS
Info from and messages to periphery
Reflex actions to protect body
There are 31 pairs of mixed spinal nerves
What are they
8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal
What spinal root contains axons of motor neurons
Anterior/ventral roots
Do posterior and Dorsal roots contain axons of sensory neurons
Yes
What does the grey matter contain
Cell bodies of neurons
Neuroglia
Unmyelinated fibres
What are the five components of da spinal reflex
Receptor- detects stimuli
Sensory neuron- transmits impulses to cns
Intergrating centre- synapses in cns
Motor neurone- transmits impulse to effector
Effector- Responds
