Dorsal column system
Nervous system.
Damage to the somatosensory pathway, specifically the dorsal column-medial lemniscal pathway, could result in diminished sense of touch. This pathway carries touch and proprioceptive information from the body to the brain for processing.
The spinothalamic tract is damaged.
The dorsal column-medial lemniscal. (The Fasciculus gracilis and the Fasciculus cuneatus). Responsible for: Discriminative (fine) touch, vibratory sense, position sense. <http://www.blackwellpublishing.com/patestas/chapters/10.pdf>
The ventral spinothalamic tract carries "light touch" sensation. There are three neurons that carry the information to the brain. From the cutaneous nerve(s) in the skin to the dorsal root ganglia, then to the dorsal horn in spinal cord, crossing over to the other side and traveling up to the thalamus, and finally from the thalamus to post-central gyrus. Because the axons of the neuron cross over to the other side of the spinal cord almost immediately, a spinal cord lesion will produce loss of this sensation on the opposite side of the body below where the lesion occurs. According to one of my medical books, however, light touch can ALSO be carried via the medial lemniscus tract, which doesn't cross until it reaches the brain stem. That being true, light touch could be spared even if there is damage to the ventral spinothalamic tract. I hope that helps! Compliments of your friendly MSI :)
Yes you can!
I causes a constant allergic reaction in the upper respiratory tract, leading to chronic inflammations, thus affecting the smell sense, which means causing damage to your olfactory system.
(or non-discriminative touch) is a sensory modality which allows the subject to sense that something has touched them, without being able to localise where they were touched (contrasting fine touch). Its fibres are carried in the spinothalamic tract. Unlike the fine touch which is carried in the dorsal columnAs fine touch normally works in parallel to crude touch, a person will be able to localise touch until fibres carrying fine touch (Posterior column-medial lemniscus pathway) have been disrupted. Then the subject will feel the touch, but be unable to identify where they were touched.
The Hoffmann reflex test is commonly used to detect corticospinal tract damage. This test involves tapping the middle or ring finger and observing for an involuntary contraction of the thumb and index finger. An abnormal or exaggerated response may indicate damage to the corticospinal tract.
They both carry proprioceptive and fine touch sensations. But, gracile tract carries sensations from lower halfof our body. On the other hand, cuneate tract carries sensations from upper half of our body.
Gonorrhea is an infection in the urinary tract caused by touching someone else that already has it with your sex organs. It can damage your urinary tract if not treated with an antibiotic.
lateral corticospinal tract -this would be the most major one anterior corticospinal tract - to a lesser extent a lesion of the rubrospinal tract would affect voluntary movement but not cause a lack of it