Anatomy of a Human Brain MCQ - Practice Questions with Answers

Human Brain: Location and Coverings

• The brain is located in the cranial cavity (cranium) of the skull.
• It is enclosed in a bony case called cranium which protects brain against external injury.
• The brain is surrounded by three membranes called meninges (sing-meninx).
• Outer duramater is a tough white membrane present below the cranium, closely adhering to the cranium.
• Middle arachnoid layer has a network of fibres.
• Inner piamater is a thin, transparent, and vascular membrane close to the surface of the brain and spinal cord. 
• The space between duramater and arachnoid is the subdural space.
• The space between the arachnoid and piamater is known as subarachnoid space.
• These spaces surrounding the brain as well as the cavities within the brain are filled with a fluid
• Subarachnoid space is filled with fluid called cerebrospinal fluid (CSF). 
• The cerebrospinal fluid is also present within the spinal cord.
• Functions of CSF are :

1. Mechanical cushion to brain
2. Source of nutrition to brain
3. Excretion of metabolic waste products
4. Intra-cerebral transport medium
5. Control of chemical environment
6. Auto-regulation of intracranial pressure

• The brain structure is composed of three main parts: the forebrain, midbrain and hindbrain, each with multiple parts.