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As a result of a brain injury, Marc has great difficulty producing any speech sounds. He speaks very slowly, with great effort, and his words are poorly articulated. He has suffered damage to
Myofilaments
Protein filaments consisting of actin and myosin that are the primary components of muscle contraction.
Acetylcholine
A neurotransmitter in both the central and peripheral nervous systems that plays key roles in arousal, attention, memory, and muscle activation.
Neuromuscular Junction
A specialized synapse between a motor neuron and a muscle fiber, through which signals are transmitted to initiate muscle contraction.
Neurotransmitter
Chemical stored at the ends of axons that is responsible for transmission across a synapse.
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