Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 15, Problem 2CT
As a result of a snowboarding accident, John is unable to feel fine touch, pressure, vibration, or proprioception in his left upper limb distal to his wrist. He has no other sensory deficits. A neurologist suspects that a portion of his spinal cord has been damaged. Where in the spinal cord might the problem be located, and why?
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Wallace is the victim of a hunting accident. A bullet grazed his vertebral column, and bone fragments severed the left half of his spinal cord at segments T8 through T10. Since the accident, Wallace has had a conditioncalled dissociated sensory loss, in which he feels no sensations of deep touch or limb position on the left side of his body below the injury, and no sensations of pain or heat from the right side. Explain what spinal tract(s) the injury has affected and why these sensory losses are on opposite sides of the body.
Peyton felt strange when she awoke one morning. She could not hold a pen in her right hand when trying to write an entry in her diary, and her muscles were noticeably weaker on the right side of her body. Additionally, her husband noticed that she was slurring her speech, so he took her to the emergency room. What does the ER physician suspect has occurred? Where in the brain might the physician suspect that abnormal activity or perhaps a lesion is located, and why?
your patient, Mr. Pratchett, is unable to open his eyelid. on examination, you find that his pupil is dilated, and he is unable to move his affected eye in any direction except laterally and downward, indicating that only his lateral rectus and superior oblique extrinsic eye muscles are functioning. based on this information, which cranial nerve do you think is involved in Mr. Pratchett's condition? explain your reasoning
Chapter 15 Solutions
Human Anatomy (9th Edition)
Ch. 15 - Match each numbered item with the most closely...Ch. 15 - Prob. 2RFTCh. 15 - Match each numbered item with the most closely...Ch. 15 - Prob. 4RFTCh. 15 - Prob. 5RFTCh. 15 - Match each numbered item with the most closely...Ch. 15 - Prob. 7RFTCh. 15 - Prob. 8RFTCh. 15 - Match each numbered item with the most closely...Ch. 15 - Prob. 10RFT
Ch. 15 - Prob. 11RFTCh. 15 - Which of the following are spinal tracts within...Ch. 15 - Prob. 13RFTCh. 15 - 14. Give the anatomical names of the spinal tracts...Ch. 15 - Prob. 1RCCh. 15 - Prob. 2RCCh. 15 - Why do the proportions of the sensory homunculus...Ch. 15 - Prob. 4RCCh. 15 - 5. Compare the actions directed by motor commands...Ch. 15 - Prob. 1CTCh. 15 - As a result of a snowboarding accident, John is...
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- While playing football, Ramon is tackled hard and suffers an injury to his left leg. As he tries to get up, he finds that he cannot flex his left hip or extend the knee. Which nerve is damaged, and how would this damage affect sensory perception in his left leg?arrow_forwardwhy does the injury of the spinal cord at the lumbar region would lead to paralysis and loss of sensations of the lower limbs (legs)?arrow_forwardDescribe the functional problems that would be experienced by a person in which these fiber tracts have been cut: (a) lateral spinothalamic, (b) ventral and dorsal spinocerebellar, (c) tectospinal.arrow_forward
- Mrs. Smith has had a stroke. Although her sensory perception is intact, her right arm’s movement is reduced. She appears to understand what is said to her, but has difficulty responding to questions. Which brain region is likely affected?arrow_forwardA person who was injured in a car accident exhibits the followingsymptoms: extreme paresis on the right side, including the arm andleg; reduction of pain sensation on the left side; and normal tactilesensation on both sides. Which tracts are damaged? Where in the spinalcord did the patient suffer tract damage?arrow_forwardA 45-year-old man complains of shooting pain down his right leg that worsens with sitting and coughing. He also has some numbness in the area. The physician tests sensations of the lateral thigh region. Which of the following spinal nerve levels is being tested? L4 and L5 S3 and S4 O L2 and L3 S1 and S2 O L1 and L2arrow_forward
- A person with a spinal cord injury is experiencing loss of pain sensation in his left leg and loss of tactile sensation in his right leg. On which side of the spinal cord is the injury located? Explainarrow_forwardMs. Young feels deep pressure during a tooth extraction. Which type of sensory receptordetects this sensation? Explain your answer. A stroke in the primary motor area has caused Don to lose control over his skeletalmuscles on the right side of his body. What lobe of his brain was damaged? Explain youranswer. Sally has a brain injury; she knows what she wants to say but can't vocalize the words.What part of Sally’s brain is affected? Explain your answer. Wendy had a few alcoholic drinks, then found walking and maintaining her balance difficult.Which part of her brain was sedated by the alcohol? Explain your answer.arrow_forwardA patient arrives in the ER and is complaining that light hurts his eye, and he is having some double vision. Upon examination, you notice that his right eye pupil is enlarged and his eyelid looks a bit droopy. When you ask him to follow your finger, you also notice that his right eye tends to stay more lateral (he can’t fully rotate the eye medially…) What cranial nerve would you think might be affected?arrow_forward
- Which of the following parts of a neuron occupies the gray matter in the spinal cord? (a) tracts of long axons, (b) motor neuron cell bodies, (c) sensory neuron cell bodies, (d) nerves.arrow_forwardA patient is taken to the hospital when his roommate noticed something wrong with the left side of his face during breakfast. It is discovered he has a problem with the nerve exiting the stylomastoid foramen, a disorder called Bell's palsy. Which of the following problems is this patient likely to have? He is unable to open his left eye He is unable to feel pressure on his left cheek O He is unable to raise his eyebrow on the left side O He is unable to chew O He is unable to protrude his tongue to the rightarrow_forwardChoose ALL the cranial nerves below that are both sensory and motor (mixed): Olfactory (1) Trigeminal (V) Vestibulocochlear (VIII) Facial (VII)arrow_forward
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