2011_365RExam 2 solution

2011_365RExam 2 solution - Name fl“ g LOW EID Quiz 2 BME...

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Unformatted text preview: Name fl“ g LOW EID Quiz 2 BME 365R Nov. 3, 2011 Short answer (2 points each) 1. Target for electrical stimulating implants to suppress chronic pain: a. superior colliculus .eri—aqueductal gray matter c. post—central gyrus d. reticulospinal tract 2. A 67 year-old patient was referred to Eye Institute for evaluation of diplopia which started 3 days after a stroke. The eye movement disorder is shown here. What is the CN involved? a. left IV - b. left Ill x ®efi VI ("K Q9 0': (1. right 111 e. right VI 3. Neurological exam for the patient in problem 2 showed normal strength in both hands but the patient was in a wheelchair and could not stand alone. Further testing showed dysdiadochokinesia on the right side, past-pointing, and dysmetria on the right. Proprioception was normal. Where was the stroke? a. left middle cerebral artery right internal capsule ight cerebellum . left cerebellum 4. The pathology is localized to what area of the brain: a. cortex b. internal capsule c. basal ganglion @ons and cerebellum 5. The ophthalmic branch of the trigeminal nerve exits the intracranial space here: a. foramen spinosum fl: I b. foramen ovalle c. foramen rotundum @uperior orbital fissure 6. A patient has a right hemisection of the mid-thoracic spinal cord (right half of t e spinal cord is cut). The sensory defect expected: a. loss of P&T in the right leg, loss of proprioception on the left leg b. loss of P&T in the left leg, loss of proprioception in the left leg oss of P&T in the left leg, loss of proprioception in the right leg . loss of P&T in the right arm, loss of proprioception in the right leg g L. 7. The patient with the right mid—thoracic hemisection of the spinal cord would have What motor defect? a. weakness in the right arm and leg b. weakness in the left arm and leg @eakness in the right leg . weakness in the left leg ; 8. A patient has a drooping left eyelid, left eye is turned out, loss of pupillary light reflex in the left eye, and weakness of the upper limbs and lower facial muscles on the right side. Where is the lesion? L JZE‘ Meyoux/La a. medial left ponto—medullary junction .asomedial region of the left cerebral peduncle c. dorsolateral medulla on the left A d. periaqueductal gray matter on the left cjb (W g z 7 l/em‘rpé Feedback system “WWW—M-..“ V 9. What is the closed-loop gain function for the system shown above? 7 r‘,’ 7 (egg-1015+”? _‘<_.__ ’23,.” 42...? 10 /(s+10) .. 2 7 {5 a _ c. s/(s+107) Cc —- H (CH 1+ ’75.” n" ' d. 107s/(s+107) , 10. What is the midband gain for the closed loop? 3 : .1» (( I 0.7 a. 107 g .- e» b. 105 c“ c. 10 @1 / r 11. What is the midband gain for the feed-forward function? ! a. 10 b. 104 c. 105 @107 12. What is the gain-bandwidth product? ‘ " a. 103 , 11-10“ f5?) ! 2 ”0 ,_ c. .107 A 13. This closed-loop system is an example of a: a. high pass filter ®low pass filter c. mid-band filter d. integrator a, 14. If we added sin60t distortion at the node marked D, what is the resulting distortion in l, the output, assuming jw<<1? ‘ Sim 6 o ‘6‘ / g D 5 @10'7sin60t ,/ , 7 19'3““ i b. 10-53mm (-l- k H .. [4. fl 1 c. lp'ssin6t f—F/ Ska!“ 1 d. srn60t ( + I01 15. If the feedforward gain were to change 100%, what would be the %change in closed loop gain, assuming jw<<1? ’ a.10‘3 0%} ii fl , 4’6: i (I) _ - -——-—- .. ~— —~ 2 «r a» Go ’ NM K ’ Cc 14 %, c. 10'7 y “46' __S I d.10'8 Lch ‘M =/@ r: ”M, 097 jvrct :: /d"7 1+ 10 ‘ 16. A patient presents with a history of minor head trauma and increasing headache. On examination, the right eye is bright red. Auscultation reveals a bruit (swishing noise) around the eye. The most likely diagnosis is: . carotid artery embolism arotid—cavernous sinus fistula c. aneurysm of the anterior communicating artery d. middle cerebral artery stenosis 17. A 21 year old mailman was referred to the neurology service because of severe headaches over the last 6 months. He stated that his eyesight had deteriorated and he often felt cold even in warm weather. Neurological exam showed bitemporal hemianopia, pale optic nerves without papilledema, normal pupils, and no motor or sensory weakness. Inspection of the genitals showed underdeveloped testes and no pubic hair. The most likely diagnosis is: a. aneurysm of the posterior cerebral artery .pituitary adenoma c. glioblastoma in the occipital lobe d. tumor in the mesencephalon 18. A 63 year old homeless man was transported to Brackenridge Hospital because of loss of consciousness. On admission his temperature was 103 degrees F. He appeared malnourished and dehydrated. Neurological findings included a stiff neck, movement of all extremities, and normal pain responses in all extremities. Blood glucose level was 120 mg/dl. Lumbar puncture results were: opening pressure=20 cm H20, cell count=20,000/uL mostly polymorphonuclear leukocytes, glucose=l 8 mg/dL, protein=70 mg/dL. The most likely diagnosis: a. hyponatremia from dehydration b. aneurysm of the anterior communicating artery 0. obstructive hydrocephalus @neningitis 19. A 68 year-old hypertensive right-handed housewife awoke one morning and fell when she attempted to get out of bed. Her speech was unintelligible and she appeared to have great difficulty comprehending what was said to her. On examination the following signs were noted: weakness of the lower half of the right face, her tongue deviated to the right on protrusion, the right arm and leg were both weak, DTRs were absent on the right, proprioception and P&T were both diminished on the right. The most likely site for the pathology: a. left mesencephalon near the red nucleus b. right internal capsule near the pulvinar c. right internal capsule near the putamen @ft cortex near central sulcus 20. The most likely cause of our housewife’s pathology r»@left middle cerebral artery occlusion b. right anterior cerebral artery occlusion c. aneurysm at the junction of the posterior communicating and middle cerebral arteries d. lenticulostriate intracerebral hemorrhage 21. A 72 year old male patient presents with a history of slowly progressive bradykinesia. On neurological exam you find he has a resting tremor which is worse in the right hand compared with the left hand. He has normal motor strength and proprioception in all extremities. The most likely diagnosis is: a. myasthenia gravis b. Huntington’s Disease c. Cerebellar stroke oarkinson’s Disease WW L c0114 n'ew- CW We“; MWW“ 22—30. Conscious Proprioception ( 2 points each) The first order neuron for conscious proprioception has its cell body in DES; .The projection of this first- order neuron is in the _?¢fi‘h~m “(001M115 to the first synapse in the Gram leffued’g nucleus at the level of the WM! {9544, The second order neuron crosses in the fibers and proj ects to the VPL nucleus of the thalamus. The third order neuron pro; ects to 93“ re 33 m5 .Two ddiseases of the conscious proprioception pathway are 152319599 gi... / '2 (1", Anatomy (2 points each) 1. merging. 7,4“;er 2- £3013 {M {0:} 3. (film/0M4? Woéj LL] 4. ocfiggfi CZ) C A, 5- 01740 (fig 7. p [Mfg/"7° ((WWWCX‘VMCL) g. ”4%, ,flgéé g i 9. W%% 10. Q Handing {:9 W005 —_ .——~ 11. ”(k/WM 17; (4, “T W12. (“aw/£72 n 13- T ffifiw effiwfde/g T14. cam/7a; fajita/MW ...
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