Introduction to the Nervous System Flashcards
How do you distinguish between the CNS and PNS?
CNS: Brain and Spinal Cord
PNS: Cranial and Peripheral Spinal Nerves
What is the brain comprised of? (In the NS)
Cerebrum, Cerebellum and Brain Stem
What are folds and grooves called in the brain?
Folds: Gyri Grooves: Sulci
What are the three layers of the Brain?
1) Dura Mata (Covers all)
2) Arachnoid Mata (Spiders web)
3) Pia Mata (Thin unable to see)
Function of the Sub-Arachnoid Space?
Contains arteries and Cerebral Spinal Fluid
What are the 4 main blood vessels and what do they make up?
1) 2 x Internal Carotid Arteries
2) 2 x Vertebral Arteries (Join to form Basilar Artery)
- Collectively make up the Circle of Willis
How many cranial nerves, and types of function?
12 pairs of Cranial Nerves, and sensory, motor, both
Name the Sensory Cranial Nerves: (128)
1) Olfactory
2) Optic
8) Vestibular
Name the Motor Cranial Nerves:
(Who do we appreciate it bar 8)
(Final 2)
3,4,6: Eyemovement (Oculomotor, Trochlear, Abducens)
11: Accessory: Sternoclastoid and Trapezius
12: Hypoglossal
Name the Multifunctional Cranial Nerves?
5) Trigeminal (MOM)
7) Facial
9) Glossopharyngeal
10) Vagus
Difference between the 2 types of matter?
1) Grey (Cell bodies) 2) White (Myelinated axons)
Where does the Dorsal and Ventral roots run from?
Dorsal: Sensory N to SC
Ventral: SC to Motor N
Function of Dermatome?
Area of skin supplied by 1 spinal nerve root
Function of Brachial Plexus?
Supply A&E nerve fibres to upper limbs
How is Autonomic Nervous System divided?
Unconscious control 1)PS: R/D 2)S: F/F from Scord
