What is the average weight of the human brain -2 lbs, 3 lbs, 5 lbs, or 10 lbs?
True or false:The lower end of the brain stem is a continuation of the spinal cord?
Above the brain stem is the diencephalon, which contains which two components?
The thalmus and the hypothalamus
What part of the brain is spread over the diencephalon?
What part of the brain constitutes about 7/8 of the total weight of the brain?
What are the two layers of the cranial dura mater?
The Periosteal (outer layer) and the Meningeal (inner) layer
What is the name for the fluid inside the brain and what does it do?
It is called the cerebrospinal fluid and it protects the brain (like a shock absorber) and allows circulation of nutritive fuids (proteins, glucose, urea, and salts)
How many ventricles are there in the brain? What do they communicate with?
Four: two lateral ventricles, the third (which contains the interventricular foramen), and the fourth ventricle. The ventricles communicate with each other and with the central canal of the spinal cord
What is the most metabolically active organ of the body?
What is the function of the blood brain barrier?
To prevent harmful substances from entering the brain. The barrier is selective and permits only very small molecules or those attached to carrier molecules
What part of the brain is a continuation of the upper portion of the spinal cord and forms an inferior part of the brain stem?
The Medulla Oblongata
The medulla oblongata contains the nuclei of origin for several pairs of cranial nerves. Name one.
1. cochlear and vestibular nerves (vestibulocochlear)2. the glossopharyngeal (swallowing, salivation, taste)3. vagus (thoraacic and abdominal viscera)4. accessory nerves (head and shoulder movements)5. hypoglossal nerves (tongue)
The Pons consist of white fibers scattered throughout with nuclei and form a bridge connecting the spinal cord with what organ?
The Brain.The Pons also connect parts of the brain with each other
The bulk of the brain is called what?
The transverse fissure separates the cerebrum from what organ?
The limbic system contains the hippocampus, the amygdaloid nucleus,and parts of \the hypothalmus. Damage to the limbic system could affect a person's ability to do what?
Remember/memoryorAbility to feel pain or pleasure/affection
Of the following three brain injuries, which is the most severe: cooncussion, contusion, or laceration?
Laceration is the most severe and is a tearing of the brain, usually from a skull fracture or gunshot woulnd. Large blood vessels are ruptured causing bleeding into the brain.
A record of brain wave activity is called what?
An electroencephalogram (EEG)
There are four types of brain waves. Each type has a different frequency range. Name two types of brain waves.
Alpha - restingBeta - active brain activityTheta - assocaited with emotional stressDelta - associated with deep sleep or infancy
What part of the brain is shaped like a butterfly and is the second largest portion of the brain?
The Cerebellum (posterior to the medulla)
What part of the brain relays motor impulses from the cerebral cortex to the pons and spinal cord, and relays sensory impulses from the spinal cord to the thalmus?