Piga-piga
{{Infobox anatomy|Name=Piga-piga|Latin=musculus biceps femoris|Image=Grays anatomy 1918 plate 434 biceps femoris muscle both heads marked.png|Caption=Posterior view of right leg. Long head of muscle highlighted in red, short head (yellow) labeled in the lower part of the image|Image2=|Caption2=|Origin=[[tuberosity of the ischium]], [[linea aspera]], [[femur]]|Insertion=the [[head of fibula|head of the fibula]] which articulates with the back of the [[lateral condyle of tibia|lateral tibial condyle]]|Blood=[[deep femoral artery]], [[perforating arteries]]; long head of biceps femoris: perforating branches from profunda femoris artery|Nerve=long head: [[tibial nerve]]<br>short head: [[common fibular nerve]]|Action=[[Flexion|flexes]] [[knee|knee joint]], [[external rotation|laterally rotates]] knee joint (when knee is flexed), [[Extension (kinesiology)|extends]] [[hip|hip joint]] (long head only)|Antagonist=[[Quadriceps femoris muscle|Quadriceps muscle]]}} An '''piga-piga''' iyo an kalamnan kan [[tabay nin tawo|tabay]] na manonoparan sa atubangan, o likudan. Siring sa boot sabihon kan saiyang ngaran, igwa siyang duwang parte, an saro kaan (an halabang payo) nagbibilog sa kabtang kan [[Hamstring|hamstrings]].

==Gibo==
An duwang payo kan piga-piga perform knee flexion.<ref name="Layola">[http://www.meddean.luc.edu/lumen/MedEd/GrossAnatomy/dissector/mml/bfem.htm Origin, insertion and nerve supply of the muscle] at Loyola University Chicago Stritch School of Medicine</ref>

Nin huli ta an halabang payo naggikan sa pelvis ini imbwelto sa ekstensyon kan piad.<ref name="Layola" />  An halabang payo kan piga-piga mas maluyang flexor kan tuhod kapag an piad nakaunat (nin huli sa [[aktibong insufficiency]]).  Para sa kaagid na rason an halabang payo mas maluyang mag-unat kapag an tuhod naka-flex.

Kapag an tuhod naka-semi-flex, an piga-piga sa konsikwensiya kan saiyang oblique direction pig-iitok an tabay nin dikit paluwas.

== Toltolan ==
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An piga-piga iyo an kalamnan kan tabay na manonoparan sa atubangan, o likudan. Siring sa boot sabihon kan saiyang ngaran, igwa siyang duwang parte, an saro kaan (an halabang payo) nagbibilog sa kabtang kan hamstrings.

Gibo
An duwang payo kan piga-piga perform knee flexion.Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine

Nin huli ta an halabang payo naggikan sa pelvis ini imbwelto sa ekstensyon kan piad.  An halabang payo kan piga-piga mas maluyang flexor kan tuhod kapag an piad nakaunat (nin huli sa aktibong insufficiency).  Para sa kaagid na rason an halabang payo mas maluyang mag-unat kapag an tuhod naka-flex.

Kapag an tuhod naka-semi-flex, an piga-piga sa konsikwensiya kan saiyang oblique direction pig-iitok an tabay nin dikit paluwas.

 Toltolan