Cook pasta according to package directions, omitting salt and fat.
Drain; return to pan. Stir in spinach; toss until spinach wilts. Set aside.
Melt 1 tablespoon butter in a large nonstick skillet over medium-high heat.
Add mushrooms, and cook, stirring occasionally, 8 minutes or until browned.
Add onion, and saut over medium heat 10 minutes or until tender.
Add garlic; saut 1 minute.
Stir in chicken broth and white wine. Increase heat to medium-high, and cook, stirring often, 8 minutes or until mixture thickens slightly. Reduce heat to medium. Stir in cream cheese and next 3 ingredients until smooth.
Add shrimp, and cook until thoroughly heated.
Pour shrimp mixture over pasta mixture; toss to combine.
Sprinkle evenly with grated Parmesan cheese, and serve immediately.
*1/4 cup reduced-sodium chicken broth may be substituted.