Anatomy - Nervous system Flashcards
(25 cards)
Name all the cranial nerves
- CN I olfactory nerve sensory
- CN II optic nerve sensory
- CN III oculomotor nerve motor
- CN IV trochlear nerve motor
- CN V trigeminal nerve both
- CN VI abducent nerve motor
- CN VII facial nerve both
- CN VIII vestibulocochlear nerve sensory
- CN IX glossopharyngeal nerve both
- CN X vagus nerve both
- CN XI spinal accessory nerve motor
- CN XII hypoglossal nerve
What travels through the cribriform plate of the ethmoid bone?
CN I olfactory nerve sensory
What travels through the optic canal?
CN II optic nerve sensory
What travels through the superior orbital fissure?
CN III oculomotor nerve motor
CN IV trochlear nerve motor
CN V1 trigeminal nerve both
CN VI abducent nerve motor
What travels through foramen rotundum?
CN V2 trigeminal nerve both
What travels through foramen ovale?
CN V3 trigeminal nerve both
What travels through internal acoustic
meatus?
CN VII facial nerve both
CN VIII vestibulocochlear nerve sensory
What travels through jugular foramen?
CN IX glossopharyngeal nerve both
CN X vagus nerve both
CN XI spinal accessory nerve motor
What travels through hypoglossal canal?
CN XII hypoglossal nerve
Spinal cord ends at..
L1/L2 IV disc level - conus medullaris
Lumbar and sacral spinal nerve roots descend to..
Cauda equina (horse’s tail)
ALL sensory axons pass from..
The spinal nerve into the posterior root then
into the posterior rootlets then into the posterior horn of the spinal cord
ALL motor axons pass from..
Anterior horn of the spinal cord into the anterior rootlets then into the anterior root then into the spinal nerve
What does posterior rami supply?
Supply small posterior strip
What does anterior rami supply?
Supply the remainder of the posterior part, the lateral and the anterior parts of the strips
Supply all of the limbs
Define dermatome
Area (strip) of skin supplied by both the
anterior and posterior rami of a spinal nerve
Nipple dermatome
T4
Umbillicus dermatome
T10
Cervical plexus
C1-C4 anterior rami
Posterior scalp, neck wall …..and diaphragm
Brachial plexus
C5-T1 anterior rami
Upper limb
Lumbar plexus
L1-L4 anterior rami
Lower limb
Sacral plexus
L5-S4 anterior rami
Lower limb, gluteal region and perineum
What are the body wall organs?
Sweat glands, arrector smooth muscles, arterioles
Sympathetic outflow
Passes down spinal cord
Exits spinal cord with T1-L2 spinal nerves
Travel to sympathetic chains running the length of
vertebral column
- Pass into all spinal nerves
- Anterior & posterior rami
To supply body wall structures (skin, sweat glands,
arterioles)
‘Hitch a ride’ with arteries to all head and neck organs
and skin
Travel via splanchnic nerves to reach organs
