Flashcards in Anatomy (2) Deck (57)
After orbital trauma - where does the fractured zygoma tend to rotate towards?
Medially towards floor of orbit
What is the name for the thick facial sling that holds the eye just above the floor of the orbit?
Suspensory ligament of the eye
What can a drop of the suspensory ligament of the eye cause>
What nerve gives general sensory nerve supply to the upper eyelid, cornea, all conjunctiva and the skin of the root/bridge/tip of the nose?
What nerve gives general sensory nerve supply to the skin of the lower eyelid, skin over maxilla, skin of the ala of the nose and the skin/mucosa of the upper lip?
What is the infraorbital nerve a branch of?
What nerve gives general sensory nerve supply to the skin over the mandible and temporomandibular joint?
What nerve gives general sensory nerve supply to the angle of the mandible?
C2, C3 spinal nerves
If you touch the cornea to initiate a blink reflex - what nerve sets up action potentials?
Trigeminal V1 - then goes to pons of brain
In the blink reflex - what are the two nerves that have CNS connections?
CN V and CN VII
In the motor reflex of the blink reflex - where are action potentials conducted?
Peripherally in CN VII to the eyelid part of orbicularis oculi
What are the four steps on the presynaptic sympathetic axons from the CNS coirse?
1, Descend in the spinal cord and then
2. Exit the spinal cord in T1 spinal nerve and then
3. Ascend within the sympathetic trunk and then
4. Synapse in the superior cervical sympathetic ganglion
What do the post synaptic sympathetic axons enter ?
The internal carotid nerve and the external carotid nerve. Then pass onto surfce of internal anad external carotid ateries.
What artery carries sympathetic axons into the orbit?
What do the inferior cervical and 1st thoracic ganglia often fuse to form?
The stellate ganglion
What 4 cranial nerves contain presynaptic parasympathetic axons?
3, 7, 9 and 10 plus sacral spinal nerves
Where are the ganglions located for parasympathetic axons?
Within the organ
What ganglion in the orbit collects presynaptic parasympathetic axons from CN III?
What CN gives parasympathetic axons to the lacrimal gland, submandibular and sublingual salivary glands?
Where does the CN III connect with the CNS?
At junction between midbrain and pons
What is the base of scull part of course for CN III?
Superior orbital fissure
What does the superior branch of CN III supply?
Superior rectus and levator palpebrae superioris
What does the inferior branch of CN III supply?
Medial rectus, inferior rectus, inferior oblique and the ciliary ganglion
What do the ciliary nerves supply autonomic axons to?
Control the diamter of the iris and the refractive shape of the lens
What nerve synpses in the ciliary ganglion?
Inferior branch of CN III
What does the long ciliart nerves form the first part of?
Afferent limb of the blink reflex
What nerve from CN III is somatic sensory, parasympathetic and sympathetic?
Inferior branch of CN III leading to SHORT CILIARY NERVE
What nerve from CN III is somatic sensory and sympathetic?
LONG CILIARY NERVE
What is the name for the reflex that focusses the lens?