18 Questions
Which region of the spinal cord is associated with a lesion if a patient presents with a dermatomal pattern of sensory loss in the sacral dermatome?
Lumbar
What is the major arterial supply of the spinal cord?
Anterior spinal artery
Which structure of the spinal cord is responsible for transmitting sensory information to the brain?
Dorsal root
Damage to the corticospinal tract would most likely result in which impairment?
Impaired fine motor skills
Which ascending pathway carries information related to discriminative touch and proprioception?
Dorsal column pathway
In which descending pathway do motor fibers decussate at the medullary pyramids?
Corticospinal tract
Which tracts transmit sensory information from the upper body and lower body, respectively?
Fasciculus cuneatus and lateral spinothalamic tract
Which pathway is responsible for contralateral hemiparesis/paralysis?
Lateral corticospinal tract
Which neuron is located in the ventral horn of the spinal cord?
Primary neuron
Which sensory pathway involves the gracilis and cuneate nuclei as secondary neurons?
Dorsal column pathway
Damage to which cranial nerves may result in contralateral lower facial paralysis?
CN V or CN VII
Which motor tract originates from the motor cortex in Brodmann area 4?
Lateral corticospinal tract
Which of the following best describes the clinical features associated with a herniated lumbar nucleus pulposus affecting the L5-S1 disc?
Pain over sacroiliac joint, hip, lateral thigh and leg
In a spinal cord lesion affecting the lumbar region, what motor function may be impacted leading to difficulty walking on heels?
Dorsiflexion of great toe and foot
Which of the following regions is innervated by the first sacral nerve root?
Over sacroiliac joint, hip, posterolateral thigh and leg to heel
Which of the following is a common clinical feature in herniated lumbar nucleus pulposus that affects the L5 nerve root?
Plantar flexion of foot and great toe affected; difficulty walking on toes
Which of the following sensory tracts is responsible for transmitting sensations of fine touch and vibration?
Posterior tracts
In a spinal cord lesion affecting the lumbar region, which reflex may be diminished or absent?
Ankle jerk reflex
This quiz covers the spinal cord pathways, ascending and descending tracts, pathology related to spinal cord lesions and diseases, and the arterial supply of the spinal cord. Join Dr. Kiran C. Patel College of Osteopathic Medicine's lecture by Dr. Nicholas Lutfi to enhance your understanding.
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