trigeminal sensory pathways
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| trigeminal nerve is the general sensory nerve for the head. what is it responsible for?' | touch, proprioception, pain/temperature
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| list the trigeminal nuclei involved in CN 5 | chief sensory nucleus of 5, spinal trigeminal nucleus, mesencephalic nucleus of 5
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| what is the GSE of CN 5 responsible for? | sensation of touch, pain, temperature, joint position, and vibration for the face, mouth, anterior two thirds of tongue, nasal sinuses, and meninges
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| what is hte branchial motor for CN 5 responsible for? | muscles of mastication and tensor tympani muscle.
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| general somatic sensory innervation to the face is provided by which cranial nerves and what nuclei do they travel on? | 5,7,9,10 and they travel on the trigeminal nuclei
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| the trigeminal sensory nuclear complex is made of which nuclei? | main sensory nucleus, spinal nucleus of 5, mesencephalic trigeminal nucleus
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| what is the sensory modality for the mesencephalic trigeminal nucleus | proprioception
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| what is the sensory modality fo rthe chief trigeminal sensory nucleus, its pathway to the thalamus, and the main thalamic nucleus? | fine touch and dental pressure, trigeminal lemniscus, VPM
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| what is the sensory modality for the spinal trigeminal nucleus, its pathway to the thalamus, and the main thalamic nucleus? | crude touch, pain, temperature, trigeminothalamic tract, VPM
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| what is the sensory modality fo rthe posterior column nuclei, its sensory modality, the pathway to the thalamus, and the main thalamic nucleus? | fine touch, proprioception, medial lemniscus, VPL
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| what is the sensory modality for the dorsal horn, its main pathway to the thalamus, and the main thalamic nucleus? | crude touch; pain, temperature, spinothalamic tract, VPL
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| what is the mesencephalic nucleus of 5 responsible for? | proprioception from muscles of mastication, tongue, and extraocular muscles, proprioception from the periodontal ligament, and its also responsible for the jaw opening reflex.
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| what is the main sensory nucleus of 5 responsible for | discriminative touch and conscious proprioception
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| what is the pathway of the trigeminal lemniscal pathway? | main sensory nucleus travels on trigeminal lemniscus, along with nucleus gracillis and nucleus cuneatus , then on the medial lemniscus pathway to the thalamus
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| where are the first neurons in the trigeminal main sensory pathway located? | psudounipolar cell bodies in the cranial ganglia of the trigeminal, facial, glossopharyngeal and vagus nerves
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| where are the second neurons in the trigeminal main sensory pathway located? | main sensory trigeminal afferent axons
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| where do the neurons of the trigeminal main sensory pathway decussate? | immediately upon leaving, and join the contralateral ventral trigeminal lemniscus
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| the spinal nucleus of five is responsible for what | pain and temperature. it is a long upward extension of the dorsal horn of the spinal cord. it contains a set of neurons resembling the substantia gelatinosa in the spinal cord.
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| how does the trigeminothalamic pathway work? | trigeminal pain and temperature fibers descend caudally to enter the spinal nucleus of five. fibers then decussate and join the ascending spinothalamic tract as the trigeminothalamic pathway
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| in this condition patient presents with painful, sharp electric like spasms that last a few seconds or minutes but can become constant. pain is usually on one side of the face, and may be triggered by touch or sounds. | trigeminal neuralgia
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| trigeminal neuralgia is most common in what age groups | over the age of fifty. it occurs in families, and may be a result of an inherited defect in blood vessel formation. risk factors include MS and hypertension
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| is trigeminal neuralgia more common in women or men | women.
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| what is the likely cause of trigeminal neuralgia | believed to be the result of presusre on the trigeminal nerve from a swollen blod vessel or tumor causing segmental demyelination. in many cases the cause is unkonwn
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| what is believed to be the cause of severe pain in trigeminal neuralgia? | defective descending inhibitory pain pathways
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