Google puts it as: “When reflex responses are absent this could be a clue that the spinal cord, nerve root, peripheral nerve, or muscle has been damaged. When reflex response is abnormal, it may be due to the disruption of the sensory (feeling) or motor (movement) nerves or both.”
Notice there are two possible disruptions? One being Sensory Nerves, and the other can be Motor Nerves. As you can gather, it is quite evident, sensory nerves deal with feeling while motor nerves deal with movement. And yet, that is the simple definition.
Here is a more concise definition that I found on Science Digest. I will attempt to individualize this to my own understanding!
Sensory neurons are responsible for converting external stimuli from my environ into internal impulses.
What this means is that, for example, right now I am sitting at on a chair, with a keyboard on my lap, while the laptop is on the table. I am typing my thoughts to the keyboard, internal impulses from external stimuli, reading and rearranging the material in my head while typing out the thoughts. (I am very glad that I learned the home keys in Grade 5, I can type without looking at the keys, even on my beloved Blackberry!)
Let me tack in here: muscle nerves carries impulses from the brain to the muscles that are being used.
Now, that is a classic example; tactile stimuli (fingers on the home keys), then my internal impulses are indicating to the fingers to type “zeitgeist”. Smooth right? There is a connection between the sensory neurons and the motor neurons in order to achieve muscle contraction, thereby typing the word.
Another example: because I am sitting in a stooped (head forward) position, my right shoulder is telling me “pain”, and occasionally I will stretch to release that “pain” before it becomes “PAIN” and, even worse “!$@PAIN+#%”!
These connections between sensory and motor neurons underlie motor reflex loops. If one has areflexia, these connections are, at times, hell, most of the time, out of whack!
When I am typing, my fingers may (heck, often) slip off the keys, which can’t be seen as a big problem, I’m very adept at backspacing and deleting! I’ve trained myself to type without watching the keyboard, yet if I can’t find the F and J keys, this is 2yq5 j16 y1–3h! But that is just being silly! I may mistype a basic word quiet easily because my mind is going too fast for my fingers!
The article started out as a basic list of things that I am likely to drop that I want you to know:
- cell phones (I’ve encased them in rubber now)
- iPad/tablet (ditto)
- TV clickers
- White Cane
- Food of all sorts
- Pants (that I’m wearing at the time)
- My glasses
Some of these things I drop is because I didn’t see the pole or hole until I actually walked into it! I dropped my new tablet that I had for less than three months because I didn’t see the three stairs fast approaching while I was walking toward the subway. And, no, I was not playing Candy Crush while I was walking!
I guess that is all!
Enjoy your weekend!