Term
| What runs in the Central Tegmental Tract? Where is it located? |
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Definition
| It carries the afferents for taste above the solitary tract (from Pons upward) to the VPM of the thalamus |
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Term
| What is a trapezoid Body? Where is it found? |
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Definition
| It is the crossing over of fibers from the cochlear nuclei from one side to another. |
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Term
| What connects the two thalami to each other? |
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Definition
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Term
| What connects the optic recess to the anterior commisure? |
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Definition
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Term
| What does the posterior commisure connect? |
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Definition
| Entirely fibers of the brainstem. Not involved in cerebral linkage. |
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Term
| What does the term tectum refer to? |
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Definition
| The roof over the midbrain. Consists of the superior and inferior colliculi |
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Term
| Above the level of the inferior Cerebellar Peduncle, which is the only spinocerebellar tract you'll see? |
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Definition
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Term
| What fibers, besides taste, run in the solitary tract? |
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Definition
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Term
| Besides, VII and IX, which other nerve carries taste? |
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Definition
| X in the pharyngeal region. |
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Term
| Which peduncle connects the medulla to the cerebellum? Pons to cerebellum? Midbrain to Cerebellum? |
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Definition
| Inf, Mid, Sup respectively |
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Term
| In which part of the brainstem are Cochlear nuclei? (D/V) |
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Definition
| Pontine/Medullary Junction |
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Term
| What is the trapezoid body made up of? Be specific |
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Definition
| Decussating fibers from the ventral cochlear nucleus |
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Term
| At the level of which other structure would you expect to find the superior olivary nucleus? |
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Definition
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Term
| What is the lateral lemniscus? Where does it originate and terminate? |
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Definition
| It is the relay pathway from the ventral cochlear nuclei to the inferior colliculus. Fibers move through the trapezoid body to the lateral lemniscus and terminate in the inf colliculus |
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Term
| Does the lateral lemniscus carry contralateral, ipsilateral, or both input? |
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Definition
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Term
| Where does the central tegmental tract extend from? |
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Definition
| From Inf Olivary Nucleus to Midbrain |
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Term
| Through what do the vestibular afferents and efferents connect to the cerebellum? |
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Definition
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Term
| Through what passage does the ventral spinocerebellar tract reach the cerebellum? |
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Definition
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Term
| What is mainly contained in the middle cerebellar peduncle? |
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Definition
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Term
| What would you expect to see in a cortical lesion to the facial nerve? |
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Definition
| Contralateral lower facial paralysis NOT including the forehead (because efferents project bilaterally to upper face) |
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Term
| What is contained inside the facial colliculus? Why? |
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Definition
| The Abducens nucleus. This is because the facial nerve loops medial to laterally around the abducens nucleus, creating the lump. |
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Term
| What does the mesencephalic tract of V do? |
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Definition
| Receives proprioceptive input from muscles of mastication. Sends input back to trigeminal motor (reflex arc) |
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Term
| What nerves originate in Midbrain? Pons? Medulla? |
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Definition
| (1,2,3,4) (6,7,8) (9,10,11,12) respectively. 5 originates from all. Princ sensory in 5 |
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Term
| What does the inferior colliculus receive input from? Be specific |
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Definition
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Term
| Besides taste afferents, what other fibers travel in the central tegmental tract? |
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Definition
| Rubro-olivary and Reticulothalamic fibers |
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Term
| Besides taste afferents, what other fibers travel in the central tegmental tract? |
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Definition
| Rubro-olivary and Reticulothalamic fibers |
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Term
| Which 2 tracts are concerned with limb position information to the cerebellum? Which is concerned with lower limb? |
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Definition
| Dorsal Spinocerebellar (via Dorsal Nucleus of Clarke) and Cuneocerebellar tract (via Accessory Cuneate Nucleus). Dorsal Spinocerebellum for lower limbs |
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Term
| What 2 tracts convey information about the |
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Definition
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Term
| Which 2 tracts are concerned with sending info about the spinal interneurons to the cerebellum? Which tract is concerned with legs? |
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Definition
| Ventral Spinocerebellum and Rostral Spinocerebellar tract. Ventral for the legs. |
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Term
| Which tract (dorsal/ventral) spinocerebellar enters through the inferior peduncle? |
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Definition
| Dorsal Spinocerebellar Tract |
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Term
| What is the role of the inferior olivary nucleus with respect fo the cerebellum? |
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Definition
| Help participate in learning and memory functions of the cerebellar circuitry |
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Term
| Which peduncle do the olivary fibers enter through to get to the cerebellum? Do they decussate before entering? |
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Definition
| Inferior Cerebellar Peduncle, and yes they do |
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Term
| Through which peduncle do cerebrocerebellar fibers leave to reach the cortex? Do they synnapse anywhere else before getting there? Where? do they decussate before hitting final destination? |
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Definition
| SCP, ventral lateral thalamus, and yes |
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Term
| What is one way involving the red nucleus that the cerebellum has feedback on itself? |
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Definition
| Cerebrocerebellar fibers en route to cortex send fibers to the red nucleus, which send fibers to the inferior olive, which as we know sends information to the cerebellum about motor programming. Circular feedback. |
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Term
| What is the Edinger Westphal Nucleus in charge of? |
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Definition
| Directing pupilary reflex in response to light. It contains preganglionic parasymp fibers and receives afferent info from eye. |
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Term
| What do fibers entering the superior colliculus from the optic tract do? |
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Definition
| Regulate head and eye movements in response to visual stimuli/targets |
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