Brain- part of CNS

Take note of the followings:

CENTRAL NERVOUS SYSTEM(CNS) is composed of

• the brain and

• spinal cord.

The CNS is surrounded by bone-skull and vertebrae. Fluid and tissue also insulate the brain and spinal cord.

BRAIN composed of three parts:

i.the Cerebrum

ii. the Cerebellum, and

iii.the medulla oblongata

CEREBRUM

The largest and the most complex part of the brain.

Governs intelligence and reasoning, learning and memory.

Interprets impulse from the receptors.

Control the movement of skeletal muscles in voluntary activities.

CEREBELLUM

• is the second largest part of the brain, after the cerebrum.

• It functions for muscle coordination and maintains normal muscle tone and posture.

• The cerebellum coordinates balance.

HYPOTHALAMUS

• Located below thalamus.

• regulates homeostasis.

• Major coordinating centre for regulating thirst, hunger, body temperature, water balance, sugar level and blood pressure,

• links the Nervous system to the Endocrine system.

THALAMUS

• serves as a central relay point for incoming nervous messages.

• Receive impulse from all sensory receptors.

• Sorting the incoming and outgoing information in central cortex.

• Integrates the information from the sensory receptors to cerebrum.

Brainstem

• Connect the brain and spinal cord.

MEDULLA OBLONGATA

• closest to the spinal cord,

• involved with the regulation of heartbeat, breathing, vasoconstriction (blood pressure),

• and reflex centers for vomiting, coughing, sneezing, swallowing, blinking and hiccuping