Function as a group: Adduct the limb (pull leg toward body midline).

Main muscles (Ox):
1. Sartorius — narrow band on medial side of thigh; forms part of femoral triangle.
2. Gracilis — flat sheet on medial thigh.
3. Pectineus — short; from pubis to femur.
4. Adductor — large; from pelvic floor to caudal femur.

Nerve: OBTURATOR nerve (mainly).

Femoral Triangle: Bounded by Sartorius (cranial), Pectineus (caudal), abdominal wall (above) — contains FEMORAL ARTERY (pulse site in dog/cat).

ADDUCTORS — MEDIAL THIGH MUSCLES

This group of muscles lies on the inner side of the thigh. Their job is to pull the limb TOWARD the body midline (= adduction) — preventing the legs from splaying outward.

MUSCLES (all on medial thigh):
• Sartorius: A long narrow strap muscle. Forms the cranial border of the femoral triangle.
• Gracilis: Broad, thin sheet of muscle covering most of the medial thigh.
• Pectineus: Short, strong muscle from the pubic bone to the femur.
• Adductor: The biggest of this group — broad muscle from the pelvic floor to the caudo-medial femur.

NERVE SUPPLY: Mainly the OBTURATOR NERVE (which exits via the obturator foramen). Sartorius is mostly femoral; pectineus may have dual supply.

FEMORAL TRIANGLE (clinical landmark):
A triangular space on the medial thigh:
• Cranial border: Sartorius
• Caudal border: Pectineus
• Above: Abdominal wall
It contains the femoral artery, vein and nerve. The femoral artery here is used to feel the pulse in DOG and CAT.

OBSTETRIC NERVE PARALYSIS: During difficult calving, the obturator nerve can be crushed against the pelvic floor by the calf's body. Result → adductor muscles paralyse → cow's legs splay outward when she tries to stand → 'downer cow' / 'splay leg'.