As the tibial nerve travels down the popliteal fossa, and before it goes beneath the gastrocnemius, it gives off a cutaneous branch which is the medial sural cutaneous nerve. This nerve courses laterally over the lateral head of the gastrocnemius.
The daytime journey from Barcelona to Granada by train is very easy. The route we recommend is less than 8 hrs long, not bad for a journey of almost 1200 km. The best option is the once-a-day connection via Antequera-Santa Ana.
It takes about 5 hours by bus from Madrid (Estacion Sur - Southern Station) to Granada Bus Station with Alsa company and the ticket costs around 19 euros. The travel time by bus is about the same as by train but the bus ticket is much cheaper. There also some direct buses from Barajas Airport in Madrid to Granada.