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Which of the following serves as experimental evidence for retrograde signaling (muscle-to-motor neuron) during the assembly of the neuromuscular junction?

Sonic hedgehog:

In the 3-eyed frog experiment, an extra eye is transplanted onto the embryo, causing axons from two eyes to compete for space in the same tectal target. Which observation from this experiment—and the parallel findings in strabismic kittens—provides the strongest evidence for the Hebbian “fire together, wire together” rule?

Growing axons from the temporal retina normally terminate in the anterior tectum. Which statement best describes the guidance mechanism for these axons?

You are working with a patient who had a stroke 4-days ago. They present with lower extremity hemiplegia on the left-side. Which of the following diagnoses is most likely provided this patient’s clinical presentation? 

Which of the following PNF techniques is utilized for a patient who is dealing with loss of motion due to pain? 

Which of the following techniques would be most appropriate to utilize if you are working to facilitate/inhibit tone in a patient? 

Which of the following commands is most appropriate for a patient who is trying to perform D2 Upper Extremity Extension? 

A patient is admitted to inpatient rehabilitation following a CVA sustained 72 hours ago. Clinical presentation includes spastic hemiplegia on the opposite side of the lesion, with the face and upper extremities more involved than the lower extremities. Which of the following is the most likely artery affected by the CVA?

Which of the following PNF patterns is most functional for activities such as initiating gait?