Lec.1 Intro To CNS

Question 1

Embryologically:

1. in 4th week has …… brain vesicles
2. in 5th week has ……. brain vesicles
3. Prosencephalon gives …… & ……
4. Mesencephalon gives ……
5. Rhombencephalon gives ……. & ……

Answer 1

1. 3
2. 5
3. Telencephalon (cerebral hemispheres)
   Diencephalon (thalamus)
4. Midbrain
5. Metencephalon (pons and cerebellum)
   Myelencephalon (medulla oblongata)

Question 2

Neurons classification:

1. SIZE …… & ……
2. NUMBER OF PROCESSES ….. & ….. & …..
3. FUNCTION …… & …… & ……

Answer 2

1. Golgi type1 & Golgi type 2
2. Unipolar & bipolar & multipolar
3. Sensory & motor & interneurons

Question 3

Definitions:

1. Cell bodies form ……
2. Nerve fibers form ….
3. Collection of cell bodies within CNS …..
   & outside CNS ……
4. Bundle of nerve fibers within CNS ……
   & Outside CNS ……
5. Chain of successive tracts …..
6. Collection of ascending fibers in brainstem …..
7. Band connecting right&left sides ……
8. Point at which ascending or descending tract
   crosses midline ……..
9. Site of contact between 2 neurons ………
   Which are …… Types …… & ….. & …..

Answer 3

1. Grey matter
2. White matter
3. Nucleus & ganglion
4. Tract & nerves
5. Pathway
6. Lemniscus
7. Commissure
8. Decussation
9. Synapse & 3
   & axodendritic & axosomatic & axoaxonic

Question 4

1. Cells in nervous system which are
  non-excitable, supporting, protecting, nourishing
  are called .......
2. Glial cells are of ....... Origin
3. They are ...... Types 
4. Astrocytes serve ........ & .......
5. Oligodendrocytes responsible for ........
6. Microglia are of ..... Origin
7. Microglia serve as .......
8. Ependyma form ....... & .......

Answer 4

1. Neuroglia
2. Ectodermal
3. Four
4. Main support & electrical insulator
5. Formation of myelin sheath
6. Mesodermal
7. Phagocytes
8. Cells of choroid plexus & CSF

Question 5

1. …… Of …… Cranial nerves originate from brainstem
2. Damage to small area of …… Can cause death
3. …….. Controls balance and eye movement
4. Blood supply of the brain receives …… Of the cardiac output
5. Anterior half of the brain is supplied by …….
6. Posterior one by …….
7. Thoracolumbar division is ………
8. Craniosacral division is ……..

Answer 5

1. 10 & 12
2. Brainstem
3. Cerebellum
4. 20%
5. Carotid system
6. Vertebro-basilar system
7. Sympathetic
8. Parasympathetic