26 Brain & Behavior III Flashcards
Development of the nervous system STARTS at what time?
3rd week of deve
The neural ______ does WHAT to form the neural ______
Neural PLATE FUSES to form the neural TUBE
What causes Spina bifida
Nervous system develops OUTSIDE the embryo
Caused by insufficient FOLIC ACID
At the 4th week, what are the 3 thickenings?
Forebrain
Midbrain
Hindbrain
2 BRANCHES of the nervous system
CENTRAL nervous system
PERIPHERAL nervous system
Components of the CENTRAL nervous system
Brain
Spinal cord
2 branches of the PERIPHERAL nervous system
Components of each?
SOMATIC = afferent, efferent, cravial nerves AUTONOMIC = viscera (heart, lungs, BVs, digestion, sex organs)
How many PAIRS of cranial nerves
12 pairs
Cranial nerves ENTER/EXIT from
HINDBRAIN via holes in skull
FUNCTIONS of the cranial nerves
- Movement + sensation in head/neck
- Glandular secretions in head
- Sensory reception from head
List some glandular secretions in head
Tears
Saliva
Mucus
Name 3 disorders that arise from the cranial nerves
Bell’s Palsy
Trigeminal Neuralgia
Photic sneezning
CAUSE of Bell’s Palsy?
IDIOPATHIC - may be VIRAL infection of CNs?
Phenotype of Bell’s Palsy
Lose control of FACIAL muscles
Cause of trigeminal neuralgia
Idiopathic, may be VIRAL
