Let's delve into the intricacies of dopamine, an essential neurotransmitter associated with pleasure, motivation, and movement. Critical in understanding this is the concept of dopamine peaks and baselines. Importantly, every dopamine peak is followed by a trough, representing a period where dopamine levels fall below the baseline, influencing our motivational drive.

Dopamine itself isn't solely released as a response to acquiring a reward; in fact, its engagement begins much earlier. Dopamine surges in anticipation. Visualize dopamine as a wave — it rises at the thought of possibility, much like when you begin craving a mouth-watering roast beef sandwich.

Desire triggers movement, fostering goal attainment. When dopamine levels rise, triggered by the anticipation of rewards, it also relates directly to movement facilitation. Hence, if the desire is for something tangible like food or water, a dopamine "mini-peak" occurs, compelling action to fulfill that desire.

Post-desire, as dopamine levels decline below baseline, this shortfall signals us to pursue actions to alleviate it. This necessity underscores motivation — the driving force pushing us to seek solutions or acquire desired objects.

Ultimately, the orchestrated design of dopamine signifies how each rise and fall prompts motivation, ensuring our engagement in actions towards fulfilling desires. This beautifully nuanced system extends beyond trivial desires, affecting a wide array of pursuits beyond sandwiches.

"Desire for things increases dopamine, but then our level of dopamine drops below baseline, and it’s that drop below baseline that triggers the motivation."

Through a greater understanding of the dopamine journey, our insight into the mechanisms of action, desire, and ultimately motivation advances — reminding us that perhaps, each dip in dopamine, compels us to new heights of ambition.

As you navigate daily life, consider this neurological dance of peaks and in its guiding influence on decisions and movements — propelling you toward balance and fulfillment.