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  2. Lower motor neuron - Wikipedia

    en.wikipedia.org/wiki/Lower_motor_neuron

    Glutamate released from the upper motor neurons triggers depolarization in the lower motor neurons in the anterior grey column, which in turn causes an action potential to propagate the length of the axon to the neuromuscular junction where acetylcholine is released to carry the signal across the synaptic cleft to the postsynaptic receptors of the muscle cell membrane, signaling the muscle to ...

  3. Hyperfixations — on specific activities, interests and, yes, meals — are a common experience among people with ADHD. They may also hyperfocus on a particular topic, Adler says.

  4. Neuromuscular junction - Wikipedia

    en.wikipedia.org/wiki/Neuromuscular_junction

    A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. [1] It allows the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction. [2] Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy.

  5. Henneman's size principle - Wikipedia

    en.wikipedia.org/wiki/Henneman's_size_principle

    The gastrocnemius muscle is heterogeneous, composed of both "red" and "pale" muscle, and thus containing fast-twitch high force fibers. Henneman's and colleagues took advantage of the differences between the soleus and gastrocnemius muscles to show that the neurons innervating the soleus muscle:

  6. Motor unit recruitment - Wikipedia

    en.wikipedia.org/wiki/Motor_unit_recruitment

    The muscle fibers belonging to one motor unit can be spread throughout part, or most of the entire muscle, depending on the number of fibers and size of the muscle. [2] [3] When a motor neuron is activated, all of the muscle fibers innervated by the motor neuron are stimulated and contract. The activation of one motor neuron will result in a ...

  7. 7 Easy Ways to Stimulate Your Brain As You Age ... - AOL

    www.aol.com/7-easy-ways-stimulate-brain...

    "Much like muscle and that old saying 'if you don’t use it, you lose it,' using your brain can help protect it, to an extent, from some typical memory decline and slowing," says Carrie Ditzel ...

  8. End-plate potential - Wikipedia

    en.wikipedia.org/wiki/End-plate_potential

    Signal transmission from nerve to muscle at the motor end plate. The neuromuscular junction is the synapse that is formed between an alpha motor neuron (α-MN) and the skeletal muscle fiber. In order for a muscle to contract, an action potential is first propagated down a nerve until it reaches the axon terminal of the motor neuron.

  9. Afferent nerve fiber - Wikipedia

    en.wikipedia.org/wiki/Afferent_nerve_fiber

    For example, a specific muscle fiber called an intrafusal muscle fiber is a type of afferent neuron that lies parallel to the extrafusal muscle fibers thus functions as a stretch receptor by detecting muscle length. [2] All of these sensations travel along the same general pathways towards the brain.