Brain: Overview & Protective Layers (11)

Question 1

What is the brain?

Answer 1

Part of CNS contained in cranial cavity
(Brainstem, cerebellum, diencephalon, cerebrum)

Question 2

Brainstem

Answer 2

connects spinal cord to brain; integration of reflexes
necessary for survival

Question 3

Cerebellum

Answer 3

involved in control of locomotion, balance, posture
- 50% of brains neurons

Question 4

Diencephalon

Answer 4

thalamus, epithalamus, hypothalamus, subthalamus
- thirst/hunger, body temp, mood/emotions, sensory info

Question 5

Cerebrum

Answer 5

conscious thought, control
- planning, reasoning, analyzing, memories, speech, coordination

Question 6

The brain is protected by:

Answer 6

• Cranial bones
• Cranial meninges
  pia, arachnoid, and dura mater
  cranial dura mater is composed of 2 layers
• Cerebrospinal fluid

Question 7

Cerebrospinal Fluid (CSF)

Answer 7

• portion of our blood
• serum-like fluid lacking proteins, but containing nutrients (mainly glucose)
• bathes and protects the brain and spinal cord
• most synthesized in the choroid plexus – lateral
  ventricles

Question 8

What cells produce CSF?

Answer 8

ependymal cells

Question 9

Brainstem parts

Answer 9

midbrain, pons, medulla oblongata