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
How do the Vertebral Arteries pass into Cranial Cavity?
Via to foramen magnum
Which arteries join the Circle of Willis together? (4)
Anterior Cerebral, Anterior Communicating, Posterior Cerebral, Posterior Communicating
