The document summarizes the main parts of the human brain including the cerebrum, cerebellum, midbrain, pons, and medulla oblongata. It describes the location, weight, lobes, and key functions of each part such as memory, sensory perception, motor coordination, and control of vital bodily functions.

1. By: Dr. Pamela Josefina T. Fabie

3.  BRAIN
o Part of the CNS contained within the skull
o Most complex and largest mass of nervous tissue in the body
and contains billions of nerve cells
FEMALE MALE
1250 g 1380 g
Weight
Grows from decreases with
birth up to old age
5th year

4. PARTS OF THE
BRAIN

5.  Largest portion
 7/8 of the total
weight
CEREBRUM
 Cerebral surface –
cerebral cortex,
composed of gray
matter
 Fold- gyrus (gyri)
 Intervening furrows-
sulcus (if shallow);
fissures (if deep)
 Innermost part –
white matter

6. Parts of the Brain :
Cerebrum
Seat of Mental Activities
(attributed to higher centers)
• Memory
• Thinking
• Reasoning
• Moral sense
• Learning
FUNCTIONS:
• Sense of responsibility
Sensory Perception
• Pain
Initiation and • Temperature
Control of • Touch
Voluntary Muscular
• Special senses
Coordination

7. Parts of the Brain :
Cerebrum
LOBES:
1. FRONTAL – motor
functions and
personality
2. PARIETAL – sensory
functions
3. TEMPORAL – hearing
and smell
4. OCCIPITAL – vision
5. ISLAND OF REIL – libido
(sexual desires of man)

8.  “Little Brain”
 Oval in shape CEREBELLUM
 DIVISIONS:
 Ant. Lobe – posture
 Post. Lobe –
coordination of
movements
 Flocculonodular lobe
- equilibrium

9. Parts of the Brain :
Cerebrum

10.  Found between the
forebrain and the MIDBRAIN
hindbrain
 Concerned with
motor coordination
 Connects the pons
and the cerebellum
with the cerebrum

11. Parts of the Brain : Midbrain
 CEREBRAL PEDUNCLES – pair of cylindrical bodies made
up of nerve fiber tracts which connect the forebrain with
the hindbrain
 CORPORA QUADRIGEMA – 4  SYLVIAN OR CEREBRAL
rounded nuclear masses AQUEDUCT or ITER - canal
a. SUPERIOR COLLICULI which connects the 3rd and 4th
(Upper 2) – concerned with ventricles of the brain
visual reflexes
b. INFERIOR COLLICULI
(Lower 2) – concerned with
auditory reflexes

12.  Situated in front of the
cerebellum between the
midbrain and the medulla
oblongata
PONS VAROLLI
 Bridge-like structure
composed entirely of
white matter linking the
various parts of the brain
 Joins the two halves of
the cerebellum
 Contains pneumotaxic
canter – regulation of
respiration

13.  Extends from the
pons above and is
continuous with the MEDULLA
spinal cord below OBLONGATA
 Pyramidal in shape,
being broad above
and narrow below
 Nerve cells are
grouped to form
nuclei
 Origin of CN
6,7,8,9,10,11,12

14. PARTS OF THE BRAIN:
Medulla Oblongata
FUNCTIONS:
1. Organ of conduction for the passage of
impulses between brain and spinal cord
2. Contains center for control of bodily
functions
• Cardiac inhibitory center – holds heart rate to slower rate
through CN 10
• Vasoconsctrictor center – narrowing of lumen of the
arteries
• Respiratory center – controls rate of depth of respiration
• Reflex center – sneezing, coughing, vomiting, winking,
movements and secretions of the alimentary canal