Parts of the Brain

Question 1

Parts of the Brain

Answer 1

Parts of the Brain

• Brain
• Cerebrum
• Frontal Lobe
• Brain stem
• Cranial Nerves

Question 2

The Brain

Answer 2

Parts of the Brain

Composed of Neutron & Neuroglia
– acts as supporting cells.

–Protected by the Skull & Meninges.

–Made up of Gray and White Matter

3 Major Parts

• • Cerebrum
• • Cerebellum
• • Brain stem
    
    • • Medulla oblongata, pons, and midbrain.

Question 3

Cerebrum

Answer 3

Parts of the Brain

• Largest Part - 2 hemispheres - separated by a deep longitudinal fissures.
• -Surface- Numerous fold of convolutions called gyri.
• -Each hemisphere - separated by furrows called fissures or sulci.
• • Each hemisphere - 4 main lobes
    
    • • frontal lobes
    • • parietal lobes
    • • temporal lobes
    • • occipital lobes

Question 4

Lobes

Answer 4

Parts of the Brain

Frontal

• anterior portion of the cerebral hemisphere.
• controls - mood, smell and motivation

Temporal

• Posteriorly to the occipital lobe
• controls - judgement, sense of hearing and aid in memory.

Parietal

• Division of each cerebral laying beneath the parietal bones.
• controls - and evaluates the senses of touch, taste and pain.

Occipital

• Posterior region of cerebral hemisphere.
• controls - vision and is pyramid shaped.

Question 5

Cerebellum

Answer 5

Parts of the Brain

– Dorsal to the pons and medullla oblongata.

– coordinate voluntary movement.

–Does not initiate voluntary movement , it interfaces with many brain stem structures that execute various movements including posture, balance and running.

Question 6

Brain stem

Answer 6

Parts of the Brain

3 parts

• • Medulla oblongata,
  • Lowest part- continuous with spinal cord above the level of the occipital bone
    
    • regulates heart beat, swallowing, breathing blood pressure and involuntary reflexes.
• -pons
  
  • Controls functional breathing
  • Located on the ventral surface of the brain stem between the medulla oblongata and cerebral peduncle.
• -midbrain
  
  • Connects pons and cerebellum with the hemispheres of the cerebrum.
  • Reflex center for eye and head movements in response to stimuli.

Question 7

Cranial Nerves

Answer 7

Parts of the Brain

12 pair - 4 categories

- - Visceral Motor Impulses
- - Somatic Motor Impulses
- - Special Sensory Impulses
- - General Sensory Impulses

I. Olfactory Nerves - Sense of smell
II. Opitc Nerves - Sense of sigh.
III. Oculomotor Nerve - Contraction of eye muscles.
IV. Trochlear Nerve - Movement of eyeball.
V. Trigeminal Nerve - Chewing, touch, pain.
VI. Abducens Nerve - Movement of the eyeball.
VII. Facial Nerve - Movement of the face.
VIII. Vestibulocochlear Nerve - Sense of hearing
IX. Glassopharyngeal Nerve - Sense of taste and motor skill of swallowing
X. Vagus Nerve - Larynx, pharynx; also aids in the production of digestive juices.
XI. Accessory Nerve - Swallowing and movement of the head
XII. Hypoglossal Nerve - Muscles of the tongue, swallowing, and speech