This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Middle palmar space ends distally 
Select and explain. 
A. Along the digital sheaths, B. Into the flexor tendon sheaths, C. Into the web space, D. By mixing with the superficial palmer space
C: Into the web space
Answer: C: Into the web space 
Explanation: C i.e. Web space Fascial Spaces of The Palm These are potential spaces filled with loose connective tissue and their boundaries limit the spread of infection in the palm. The triangular palmar aponeurosis fans out from the lower border of the flexor retinaculum. From its medial & lateral borders a fibrous septum passes backward and is attached to the anterior border of 5th and 3rd metacarpal bones respectively.