Principles - Anatomy of Nervous System 1 - Week 7 Flashcards
What structures are involved in the CNS?
Brain & spinal cord
Which structures are involved in the PNS?
spinal nerves, cranial nerves, autonomic nerves
What is meant by a ganglion?
Bundle of nerves
Bundles of axons in the same nerve tend to…
Be travelling to the same place
Nerves which are named tend to…
supply the body wall, body cavities and organs
Name the 4 lobes of the brain.
Frontal, parietal, occipital, temporal
Which two structures give the folded appearance of the cerebral cortex?
Gyrus and sulcus
CN I is called the…
Olfactory nerve
CN I stems from which area?
Forebrain
CN II is called the…
Optic Nerve
CN II stems from which area?
Forebrain
CN III is called the…
Oculomotor nerve
CN III stems from which area?
Midbrain
CN IV is called the…
trochlear nerce
CN IV stems from which area?
Midbrain
CN V is called the…
Trigeminal nerve
CN V stems from the…
pons
CN VI is called the…
Abducent nerve
CN VI stems from which area?
Junction (between pons and medulla)
CN VII is called the…
Facial nerve
CN VII stems from which area?
Junction (Between pons & medulla)
CN VIII is called the…
Vestibulocochlear nerve
CN VIII stems from which area?
Junction (between pons & medulla)
CN IX is called the…
Glossopharyngeal nerve
CN IX stems from which area?
Medulla
CN X is called the…
Vagus
CN X stems from which area?
Medulla
CN XI is called the…
Spinal accessory nerve
CN XI stems from which area?
Spinal cord
CN XII is called the…
hypoglossal nerve
CN XII stems from which area?
Medulla
The anterior cranial fossa has the entry/exit points for which cranial nerve(s)?
CN I
The middle cranial fossa has the entry/exit points for which cranial nerve(s)?
CN II-VI
The posterior cranial fossa has the entry/exit points for which cranial nerve(s)?
CN VII-XII
The foramen in which the spinal cord sits is called the…
Foramen magnum
CN I enters/exits the skull through…
cribriform plate of the ethmoid bone
CN II enters/exits the skull through…
Optic canal
Which cranial nerves exit the skull through the superior orbital fissure?
CN III, IV, V1, VI
Where does CN V2 enter/exit the skull?
foramen rotundum
Where does CN V3 enter/exit the skull?
Foramen Ovale
Which nerves enter/exit the skull through the internal acoustic meatus?
CN VII and CN VIII
Which cranial nerves enter/exit through the jugular foramen?
CN IX, X and XI
Which cranial nerve enters/leaves from the hypoglossal canal?
CN XII
Pathology in the jugular foramen could injure which cranial nerves?
CN IX, X and XI
What are the 3 parts of the course of a cranial nerve?
CNS part, intracranial part, extracranial part
How many vertebrae are there in total?
33
Spinal nerves are named according to…
the vertebrae above it apart from in the cervical region
What are the two enlargements of the spinal cord called?
Cervical and Lumbosacral
How many pairs of spinal nerves are there?
31
Where does the spinal cord end?
L1/L2 level
The nerves of the spinal cord travel outward through…
Intervertebral foraminae
Spinal nerves attach to the spinal cord via…
Roots and rootlets
Spinal nerves attach to the soma via…
Rami
What are the two types of rami?
Posterior and Anterior
Which of the types of rami are larger?
Anterior
What is meant by a dermatome?
The area/strip of skin supplied by both the posterior and anterior rami of a nerve
What is a plexus?
A network of intertwined anterior rami
Name the 4 plexuses.
Cervical, brachial, lumbar, sacral
Sympathetic nerves exit the spinal cord with which spinal nerves?
T1-L2
All parasympathetic axons leave the spinal cord via which cranial nerves?
III, VII, IX, X and sacral spinal nerves