Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Surface anat of BS
| Question | Answer |
|---|---|
| What is the obex? | point where the central canal opens into the 4th ventricle |
| What is the Roof of the 4th ventricle | Anterior (superior) and posterior (inferior) medullary velum Choroid plexus Cerebellum |
| What does the choroid plexus produce | makes CSF |
| The velum do? | keeps spinal fluid contained |
| Where are the pyramids found? | On the ventral (anterior) surface of the brainstem (medulla) on either side of the ventral median fissure |
| What is found in the pyramids? | CST-- CBT- part of CST that supplies some cranial nuclei |
| What is in between the two pyramids? | Ventral median fissure |
| how are the pyramids organized? | Somatotopically |
| What cranial nerve exists via the ventrolateral sulcus | CN XII--Hypoglossal rootlets (all motor, tongue mvements |
| What cranial n. exits Dorsolateral sulcus | cranial part of XI (accessory), CN X (Vagus), CN IX (glossopharnygeal) |
| What is the prominent oval swelling of the lateral area of the medulla b/t the ventrolateral and dorsolateral sulci? | the Olive |
| Dorsal surface of medulla contains what? | Fasciculus gracilis fascisculus cuneatus clava cuneate tubercle vagal trigone hypoglossal trigone 3 foramina |
| Fasciculus gracilis and cuneatus are part of what? | Dorsal column-- in medulla means tract and somatotopic organization |
| What is the other name for the gacile tubercle? and what is contained at this site? | Clava; nucleus gracilis (medial) |
| What is contained in the cuneate tubercle? | the nucleus cuneatus (lateral) |
| What is contained in the vagal trigone? where is it located? | dorsal motor nucleus of the vagus; small swelling in the floor of the ventricle (lateral ridges) |
| what is contained in the hypoglossal trigone? Where is it located? | Hypoglossal nucleus; small swelling on the flor of the ventricle (medial ridges) |
| What are the three foramina on the dorsal surface of the medulla? What is their purpose? | Foramina Luschka and Foramina Magendie. openings in the fourth ventricle allowing CSF to flow from the 4th ventricle into the subarachnoid space |
| Which is more medial: luschka or magendie? | magendie (one foramina--opening at the obex) |
| Which is more lateral: luschka or magendie? | luschka (2 foramina) |
| What is located on the anterior (ventral aspect) of the pons | The bridge, basal sulcus, 3 nerves from the groove b/t the pons and medulla |
| What is the bridge that is located on the pons? | Also called "pons proper"--a thick band of transverse fibers-- going across to the middle cerebellar peduncles |
| What is the baslar sulcus on the anterior surface of pons? | furrow on the bridge that extends along the midline and coincides with the course of the basilar artery |
| What nerves emerge from the groove b/t the pons and medulla? | Abducens Facial and Vestibulochochlear |
| Looking at the lateral surface of the pons what is seen? | middle cerebellar peduncles cerebellopontine angle facial nerve vestibulocochlear n trigeminal n. |
| Looking at dorsal aspect of the pons, what can be seen? | Pontine part of the floor of 4th ventricle, walls of the 4th ventricle, roof of the ventricle |
| what does the cerebellopontine angle consist of? | the triangular space formed b/t the caudal boarder of the middle cerebellar peduncle, the adjoining part of the cerebellum and the upper part of the medulla |
| What emerges from the cerebellopontine angle? | Facial nerve and vestibulocochlear nerve |
| What is another name for the middle cerebellar peduncles? | Brachia pontis |
| The facial colliculus lies where? | rostral to the lateral recess in the floor of the ventricle |
| What forms the facial colliculus? | The abducens nucleus and the fibers of facial nerve that cross over the nucleus of the abducens |
| what is another name for the superior cerebellar peduncles? | brachia conjunctiva |
| What forms the wall of the 4th ventricle at the level of the pons | superior cerebellar peduncles (brachia conjunctiva) |
| In the pons, what joins the sup. cerebellar peduncles in midline and complete the roof of the ventricle | the cerebellar vermis in the caudal pons and the anterior medullary velum rotrally |
| midbrain is where? | consists of a short segment of brain stem b/t the pons and diencephalon |
| The midbrain comprised of what? | two lateral halves called the cerebral peduncles |
| Each of the halves (of cerebral peduncles) are divided into what? | an anterior part, crus cerebri and posterior part, the tegmentum |
| Cerebral peduncles are what? | bands coming from motor cortex (somatatopic organization)--carry CST and CBT to the spinal cord |
| The anterior aspect of the midbrain shows what? | cerebral peduncles, interpeduncular fossa CN III--occulomotor |
| What exits from the sides of the interpenduncular fossa and emerge on the surface at the transverse groove between the pons and midbrain? | The oculomotor nerves |
| dorsal aspect of midbrain is comprised of what? | Corpora quadrigemina Trochlear n. |
| What does the corpora quadrigemina consist of? | The rostral pair are called superior colliculi, and the somwhat smaller caudal pair are the inferior colliculi |
| Where does the trochlear nerves emerge? | From the posterior surface just behind inferior colliculi after decussating in the anterior medullary velum |
| Floor of the 4th ventricle | 1. caudal part formed by dorsal surface of the medulla 2. rostral part formed by the pons 3 |
| Roof of the fourth ventrical | anterior and posterior medullary vellum and cerebellum |
| Lateral boundaries of the 4th ventricle | 1. Brachium conjunctiva (sup. cerebellar peduncle 2. Restiform body (inferior cerebellar peduncle) 3. Clava (gracile tubercle) and cuneate tubercles |
| Spinal cord to brain stem tracts? | Corticospinal tracts, dorsal columns, spinothalamic tracts |
Created by:
Amusch21
Popular Speech Therapy sets