Neuro14 Flashcards
Brain Stem
Which cranial nerves lied medially at brain stem?
CN III, VI, XII
“3 (x2) = 6 (x2) = 12”
What cranial nerve arises dorsally and immediately decussates?
CN IV
“tricky trochlear”
What is the function of the Pineal gland?
Melatonin secretion
Circadian rhythms
What is the function of the Superior colliculi (AKA Tectum)?
Conjugate Vertical gaze center
“your eyes are above your ears, and the Superior Colliculus (Visual) is above the Inferior Colliculus (Auditory)”
What is the function of the Inferior colliculi?
Auditory
“your eyes are above your ears, and the Superior Colliculus (Visual) is above the Inferior Colliculus (Auditory)”
What is the Medial Geniculate Nucleus?
Part of the auditory thalamus and represents the thalamic relay between the inferior colliculus (IC) and the auditory cortex (AC)
What is the Lateral Geniculate Nucleus?
primary relay center for visual information received from the retina of the eye. The LGN is found inside the thalamus of the brain.
What is Perinaud syndrome?
Paralysis of Conjugate vertical gaze – Can’t look UP
-Lesion in Superior Colliculi
*often due to a Pinealoma
CN I
Olfactory n.
-Sensory
CN II
Optic n.
-Sensory
CN III
Oculomotor n.
-Motor
CN IV
Trochlear n.
-Motor
CN V
Trigeminal n.
-Both (sensory & motor)
CN VI
Abducens n.
-Motor
CN VII
Facial n.
-Both (sensory & motor)
CN VIII
Vestibulocochlear n.
-Sensory
CN XI
Glossopharyngeal n.
-Both (sensory & motor)
CN X
Vagus n.
-Both (sensory & motor)
CN XI
Accessory n.
-Motor
CN XII
Hypoglossal n.
-Motor
What is the Mnemonic for remembering CN function (sensory or motor or both)?
Some Say Marry Money, But My Brother Says Big Brains Matter Most
What is the only cranial nerve that does NOT have thalamic relay to the cortex?
Olfactory
What CN monitors Carotid Body and Sinus Chemo- and Baroreceptors?
Glossopharyngeal n. (CN IX)
What CN monitors Aortic Arch Chemo- and Baroreceptors?
Vagus n. (CN X)
What is the only muscle in the pharynx innervated by CN IX? What is its function?
Stylopharyngeus m.
-Elevates phayrnx, larynx
Where are the cranial nerve nuclei located?
In Tegmentum portion of Brain Stem (between dorsal and ventral portions)
What CN nuclei are in the midbrain?
CN III, IV
What CN nuclei are in the Pons?
CN V, VI, VII, VIII
What CN nuclei are in the Medulla?
CN IX, X, XII
What CN nuclei are in the spinal cord?
CN XI
