Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 14, Problem 20RQ
Which location on the body has the largest region of somatosensory cortex representing it, according to the sensory homunculus?
- lips
- thigh
- elbow
- neck
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Chapter 14 Solutions
Anatomy & Physiology
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- Which of the following words is not associated with the spinoreticular tract? pain cutaneous receptors descending tracts dorsal root ganglion all of the above are associatedarrow_forwardAccording to the somatotopic map of the primary somatosensory cortex (S1), the amount of sensory information received is proportional to the size of the body part it maps to. True O Falsearrow_forwardThe cell bodies for somatosensory receptors from the body are located in what structure? the dorsal horn O the dorsal root ganglion the dorsal column the medial lemniscusarrow_forward
- Which parts of the body have the greatest amount of space dedicated to them in the primary somatosensory cortex?Why?arrow_forwardWhich of the following nerve fibers exhibits EFFERENT nerve function? Group of answer choices: Facial nerve receiving gustatory impulses from the tongue Trochlear nerve activating extraocular muscles Optic nerve carrying photo signals Trigeminal nerve sending pain, touch and temperature sensations from your face to your brainarrow_forwardDorothy received a severe blow to her head and can no longer move the fingers on her right hand The area of her brain that may be damaged is the right somatosensory cortex left parietal lobe left motor cortex central neural cortexarrow_forward
- Which of the following tracts and decussation is correctly matched? Lateral pyramidal tract – decussation in the spinal cord Reticulospinal tract – decussation in the spinal cord Anterior pyramidal tract – decussation in the spinal cord Rubrospinal tract – decussation in the spinal cordarrow_forwardIf a human suffers a hand amputation as an adult, what will happen to the area of the somatosensory cortex that previously received information from the lost hand? The projections from the hand will still be there, but will be inactive. The projections from the hand will die, and that area of the cortex will be empty. Projections from the face and neighboring limb will expand to control that cortical area. That cortical area will die.arrow_forwardFigure shows a map of the specific areas of the primary somatosensory cortex that represent areas of the body. The cerebral cortex localizes the precise area of the body that sends sensory nerve impulses. Based on the size of the area represented on the cortex and the size of the body area, circle which body area has the greatest density of receptors:1. The lips or the hip2. The tongue or the toes3. The foot or the handarrow_forward
- Identify the location of the cell bodies of third order neurons of the Doral column medial lemniscus pathway? Ventral horn Dorsal root ganglia Dorsal horn Thalamus Medullaarrow_forwardThe signal must travel from the to the cerebral cortex to have conscious awareness of the sensation. Cerebellum Thalamus Ponsarrow_forwardWhich of the following is CORRECT regarding the trigeminal ganglion? Group of answer choices It is the most common type of sensory ganglion Its cell bodies are associated with peripheral sensory endings It is a cranial nerve ganglion It lies on the posterior column of the spinal cordarrow_forward
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