Flashcards in Medulla Deck (46)
Where does the corticospinal tract decussate?
Where are the pyramids found in the brainstem?
What three structures are in the ventral medulla?
2. Inferior olives
3. Motor decussation
What is found in the pyramids of the ventral medulla?
What is found in the inferior olives of the ventral medulla?
inferior olivary complex
What is found in the tuberculum cinereum of the ventral medulla?
Spinal nucleus and trigeminal tract
What four structures are found in the dorsal medulla?
1. 4th ventricle
2. Fasciculus gracilis
3. Fasciculus cuneatus
4. Inferior cerebella peduncle
What is found in the Gracile and Cuneate tubercles of the dorsal medulla?
Nucleus gracilis and Nucleus cuneatus
The 4th ventricle portion of the dorsal medulla is called _____ medulla
The central canal portion of the dorsal medulla is called _____ medulla
What three structures are in the open medulla?
1. Hypoglossal trigone
2. Vagal trigone
3. Lateral recess (vestibular and hearing)
Know the locations of the structures of the dorsal medulla (open and closed)
MEMORIZE DAT SHIT
What structures are found in the hypoglossal trigone?
nucleus prepositus hypoglossi
Where is the dorsal motor nucleus of CN X?
Vagal trigone (vagus nerve... CN X)
Where does the 4th ventricle become the central canal of the spinal cord?
In what structure is there a hole in the blood brain barrier so the brain can detect toxins in the blood and trigger vomiting?
where is the medulla developed from the 3-vesicle brain?
from the 5-vesicle brain?
what are the boundaries of the medulla?
rostral: post pontine protuberance to 4th ventricle
caudal: foramen magnum (1mm to motor decuss)
What is the function of the Hypoglossal nucleus?
Move the tongue
What is the function of the dorsal motor nucleus of X?
Viscera of thorax and adomen
What is the function of the Inferior salivatory nucleus?
Innervate parotid gland
What is the function of the Motor Nucleus of IX, X and XI?
IX. Stylopharyngeus muscle
X. Pharynx and larynx (speech / swallowing)
XI. Laryngeal muscles
What is the function of the *rostral* Nucelus Solitarius of VII, IX, and X?
VII. Taste - ant. 2/3
IX. Taste - post. 1/3
X. Taste - root of tongue
(Solitarius - eating a donut alone)
What is the function of the *caudal* Nucleus Solitarius of X, and IX?
X. Abdominal/thoracic viscera; larynx/pharynx, aortic body/sinus
IX. Carotid sinus/body, pharynx, auditory tube
Motor nuclei in the medula is _____ while sensory nuclei is _____
Motor - medial
Sensory - lateral
What is the function of the vestibular nucleus of VIII?
Inner ear (vestibular division)
What is the function of the cochlear nucleus of VII?
Inner ear (auditory division)
What is the function of the spinal trigeminal nucleus of V?
Skin face, forehead, anterior scalp, sinus cavities. ant 2/3 of tongue
What is the function of the spinal trigeminal of VII, IX, and X?
VII - skin behind ear
IX - post 1/3 of tonue
X - root of tongue