Final answer:
Upper motor neuron (UMN) lesions do not typically present with fasciculations. Signs that suggest a UMN lesion include muscle weakness, strong deep tendon reflexes, decreased control of movement or slowness, pronator drift, a positive Babinski sign, spasticity, and the clasp-knife response. Spasticity is an excess contraction in resistance to stretch.
Step-by-step explanation:
Upper motor neuron (UMN) lesions do not typically present with fasciculations. Fasciculations are involuntary muscle twitches that are more commonly associated with lower motor neuron (LMN) lesions. Signs that suggest a UMN lesion include muscle weakness, strong deep tendon reflexes, decreased control of movement or slowness, pronator drift, a positive Babinski sign, spasticity, and the clasp-knife response. Spasticity is an excess contraction in resistance to stretch, which is a characteristic of UMN lesions.