Final Exam Review- E2 CN's Flashcards
Which geometric “space” transmits the circumflex scapular artery?
The Triangular Space
Which geometric space transmits the circumflex humeral artery and the Axillary Nerve?
The Quadrangular Space
Which artery is located underneath the Pterion?
Middle Meningeal Artery. (very susceptible to injury)
What is the brain stem nucleus not involved in cranial function?
Ventral Medial Nucleus (in the thalamus)
NOT ON TEST: but fun knowledge, which cranial nerve wraps another CN nucleus?
VII wraps around VI’s nucleus
Which muscle is innvervated by the abducens (VI) nerve?
Lateral Rectus. Boom.
Where do the optic nerve fibers terminate after they decussate?
Occipital Portion of the Brain
What is the FACIAL EXPRESSION muscle Platysma innervated by?
VII
Which section of the brain controls balance and posture?
The Cerebellum
Which cranial nerve nuclei would be damaged if there was trauma to the Medulla? What are the other two “houses” for CN’s?
The last 4 (IX,X,XI,XII) The midbrain houses 4, the Pons houses 4, and the Medulla Houses the last 4. A GENERAL rule of thumb
What is the Masseter innervated by?
V, muscle of mastication (VII Facial Expression)
Which two CNs provide MOTOR innervation to the tongue?
XII, X
Which CN gives TASTE to the POSTERIOR 1/3 of the tongue?
IX Glossopharyngeal
What CN gives TASTE to the anterior 2/3 of tongue?
VII Facial (mandibular?)
Which CN controls the Efferent Gag reflex? What about the Afferent Gag reflex?
Efferrent:X Vagus (Throwing Up) AFFERENT: IX GlossoPharyngeal
Which nerve gives sensory information to the Hypothenar Region of the hand?
Ulnar Nerve
Which skull bone houses the vestibulocochlear nerve?
Temporal Bone
What “muscles” control LENS accommodation–>(FOCUS) in the eye?
Cilliary Body
What cranial nerve & ganglion control the Pupil?
III (Oculomotor) & Superior Cervical Ganglion. Remember LUNG cancer can lead to vision problems!
What happens to the pupil when you blow CN III? What happens when you blow the Superior Cervical Ganglion/Cilliary Body?
CN III Blown= Pupils become DILATED.. Superior Cerv. Gang=Puils cannot dilate and stay SMALL
What refers to the cross of the optic fibers?
The optic chiasm
Which directions will the eye face if you BLOW CN IV?
Up and In
What would be unaffected with a VIII lesion?
Somatic Motor Fibers. VIII is SENSORY ONLY
What is not affected in a VII Lesion?
Your ability to open the eye, so it will STAY OPEN resulting in a tarsorraphy surgery.
A lesion of CN III would do all the following except:
Constrict the Pupil (if III is blown, the pupil would be permanently dilated)
What lesion would cause a tongue deviation to the Right?
Damage to the R XII.
What CN damage would cause a Medial turn in one eyeball? TRIVIA: what is the medical name for this?
VI abducens. LR is Out…EE-so-Tropia
What is the most common palsy of a CN?
Bell’s Palsy of CN VII
A lateral tarsorrhaphy is performed because of issues with what CN?
VII, because you cannot close the eye
What MAJOR problem would lead to difficulty swallowing and a Left tongue atrophy?
Damage to the L XII due to a malignancy (cancer) lesion on L XII
What type of palsy would lead to End (LOWER) Organ dysfunction of X,XI,XII?
A Bulbar Palsy (remember?! lower lesion vs pseudo-bulbar being upper lesion)
What would the result in food dribbling from the mouth?
A Bell’s Palsy (CN VII)
Which CN is damaged if the Pt’s eye points INFERIOR and LATERAL?
III
Which CN damage would cause numbness to the Nasopharnyx?
CN IX
What nerve severance would lead directly to DEATH?
X Vagus
What CN gives SENSATION to the anterior 2/3 of the tongue? (Not talking about TASTE here)
V
AFFERENT nerve branches that innervate the mucosa of the PHARYNX are a part of which CN?
IX Glossopharyngeal
An injury to the submandibular triangle causes tongue deviation to the left, which CN has been damaged?
Left CN XII
A stroke (infarct) causes difficulty swallowing. What CN is Unaffected by this?
XI (Spinal Accessory doesn’t have anything to do with swallowing)
What CN has a lesion if a Pt has dry nasal sinuses, no tears, and no taste in anterior 2/3 of tongue?
VII
What CN damage would leave to difficultly swallowing and coughing?
X (C/O coughing)
What cranial nerve damage would cause sensitivity to loud sounds (hyperacusis)?
VII
When examining an ear infection, the Pt coughs when you put a q tip in there. Which CN caused this?
X
What CN damage would lead to Ptosis of the eyelid, dilation of the pupil, and the eye being pointed laterally and down?
III
When a pupillary light reflex test is done which nerves are being checked?
II Optic (for accomodation sending message to both eyes) III because it constricts the pupil
A middle ear infection leads to complications in temporal bone and then he Pt can’t close Right eye and can’t close mouth. Which CN was infected?
VII
After tonsils removed a Pt loses gag reflex and the sensory on posterior 1/3 of tongue. Which CN was affected?
IX Glossophayrnegal
Which two nerves are most susceptible to damage in a Mastectomy?
Long Thoracic Nerve & Thoracodorsal
The recurrent laryngal nerve is a branch off of which CN?
X
