Riley Day syndrome is a hereditary sensory autonomic neuropathy (HSAN type III). Which of the following statements are correct? Select ALL that apply
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Riley Day syndrome is a hereditary sensory autonomic neuropathy (HSAN type III). Which of the following statements are correct? Select ALL that apply
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Have normal tactile sensibility |
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Patients have a flare axon reflex response to histamine injection
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Patients have a positive Romberg’s sign |
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Monosynaptic reflexes and H reflexes are normal in this condition |
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Patients have reduced thermal and nociceptive responses
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- Inhibitory interneurons associated with the reflex arc are turned on by glutamate. Group of answer choices True False The tendon tap reflex can be elicited by a stretch in a muscle. What is the order of information flow from the primary sensory afferent to the lower motor neuron? Group of answer choices dorsal horn, dorsal root, ventral horn dorsal root, dorsal horn, ventral horn ventral root, ventral horn, dorsal horn, dorsal root In regards to the spinothalamic tract, where does the second order neuron cross midline? Group of answer choices at the spinal cord segment at the brainstem at the thalamus it never crosses midlineNeuroscience: Which of the following is true regarding sensorimotor reflexes? Group of answer choices Muscle spindle sensory afferents project to interneurons and lower motor neurons Pain receptor afferent only project to motor neurons Golgi tendon reflex causes contraction of the activating muscle The stretch reflex is a protective circuit that prevents muscle damage None of the above are trueNOTE THESE ARE ALL ONE QUESTION GROUP and need to be answered as such Identify the term that does NOT belong in the group. A. Parasympathetic tone B. Urinary tract C. Rapid heart rate D. Digestive tract Approximately 75% of all parasympathetic axons are located in the _______________. A. vagus nerve (X) B. oculomotor nerve (III) C. facial nerve (VII) D. glossopharyngeal nerve (IX) Which of these functions is NOT affected by parasympathetic stimulation? A. Secretion of insulin from the pancreas B. Secretion of thin, watery saliva C. Secretion of tears D. Secretion of sweat The parasympathetic division ________________________. A. is responsible for the fight-or-flight response B. mediates many reflexes that regulate the digestive, urinary, and reproductive systems C. causes an increase in metabolism D. decreases blood flow to the skin
- What does the neuron composition of the dorsal root ganglion tell you about sensory coding in the somatosensory system? a. The large axon sizes have a slower conduction velocity than small axon sizes. b. The uniform axon sizes for all neurons indicate that they have the same conduction velocity. c. Multiple modalities or sensations can be detected from the skin. d. Only a single modality or sensation can be detected from the skin. e. Processing must occur directly in the skin since the neurons in the dorsal root ganglion are second order neurons.Which is true regarding somatotopic organization? Select one: a. Certain areas of the body have much higher representation in the primary somatosensory cortex than other areas, and these regions will have finer tactile discrimination. b. The representation of a given area of the body in the primary somatosensory cortex is directly proportional to the size of that body area (e.g., the right index finger has less representation than the right thigh). c. The receptive fields for somatosensory neurons are circular and relatively consistent in size across areas of the body, but areas of the body with the finest tactile discrimination have many more neurons representing them in the primary somatosensory cortex. d. There is equal representation of all areas of the body in the primary somatosensory cortexA pin can be pressed against the skin lightly and elicit no response from the pain receptor how ever, if this pain is jabbed into the finger, the pain receptor may be stimulated and the finger would quickly be withdrawn through a reflex arc. use what you know about threeshold potential and the all-or-none principle to explain different levels of sensation (light touch or pain)
- A 20-year-old woman is brought to the emergency department 30 minutes after being found unconscious in her dormitory room. Part of the physical examination involves observing for conjugate eye movements after carefully opening the patient's eyelids and turning the head to the right and then to the left. The presence of this reflex suggests that the neural pathway from which of the following receptors is intact? A) Anterior semicircular canals B) Horizontal semicircular canals C) Posterior semicircular canals D) Saccule E) UtricleThe painful or burning sensation caused by capsaicin in chili peppers is caused by its activation in the ______. Question 4 options: trigeminal nerve A-delta fibers cribriform plate turbinate nucleus When we sit working at a desk, we know without looking where our legs, arms, and torso are. This perception of our body's position is known as ______. Question 9 options: motoric perception limbic perception chemoreception proprioceptionYou are recording from a touch receptor in skin. When you stimulate a spot on the skin, the receptor fires continuously until you stop the skin stimulation. Which of the following pieces of information would you need to be able to identify what kind of receptor this is? Group of answer choices Whether the area of skin that can activate this receptor is big or small Whether the receptor sends its output to the somatosensory cortex or not You don’t need any more information; you can identify this receptor just from the information provided Whether the touch receptor is connected to an Alpha-Delta fiber or a C-fiber
- Muscle fatigue has been suggested as one factor that can increase the chances of non-contact sports injuries, such as anterior cruciate ligament (ACL) tears. Notably, some researchers have noted a delay in the reflex response after muscle fatigue. With your understanding of the stretch reflex, which of the following is the most logical contributing factor to the injury? a. the distraction of the game causes inhibitory impulses to be sent down from the somatosensory cortex, so muscles are not operating at full capacity b. the proprioceptors adapt and become less sensitive c. there is an increase in time to muscle contraction after triggering a reflexWhat are characteristic for the ascending sensory pathways: Non-classical pathways use ventral and medial nuclei in the thalamus The thalamus in classical pathways project directly to the lateral nucleus of the amygdala. The thalamus in classical pathways project to primary sensory cortices. Non-classical pathways do not activate the autonomic nervous system.Monique sticks her left hand into a hot tub heated to about 43 C (110 F) in order to decide if she wants to enter. Trace the pathway involved in transmitting the sensation of heat from her left hand to the somatosensory area in the cerebral cortex.
