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Muscles Beginning With F
18 muscles in the reference begin with the letter F. Every name links to a page giving the muscle’s origin, insertion, main actions and nerve supply.
A B C D E F G H I L M N O P Q R S T V Z
| Muscle | Main actions | Nerve supply |
|---|---|---|
| Femoral Triangle Floor (Group) | Flex and adduct the thigh | Femoral and obturator nerves (L2–L4) |
| Fibular Retinaculum Muscles (Fibularis Longus and Brevis at the Ankle) | Evert the foot and brace the lateral ankle | Superficial fibular nerve (L5–S2) |
| Fibularis (Peroneus) Brevis | Turns the sole outward (eversion); Helps point the foot downward | Superficial fibular nerve (L5–S2) |
| Fibularis (Peroneus) Longus | Turns the sole outward (eversion); Helps point the foot downward | Superficial fibular nerve (L5–S2) |
| Fibularis (Peroneus) Tertius | Turns the sole outward (eversion); Helps lift the foot upward (dorsiflexion) | Deep fibular nerve (L5–S1) |
| Flexor Carpi Radialis | Bends the wrist forward (flexion); Tilts the hand toward the thumb side (radial deviation) | Median nerve (C6–C7) |
| Flexor Carpi Ulnaris | Bends the wrist forward (flexion); Tilts the hand toward the little-finger side (ulnar deviation) | Ulnar nerve (C7–C8) |
| Flexor Digiti Minimi Brevis (Foot) | Bends the little toe at its base joint | Lateral plantar nerve, superficial branch (S2–S3) |
| Flexor Digiti Minimi Brevis (Hand) | Bends the little finger at the knuckle (MCP joint) | Ulnar nerve, deep branch (C8–T1) |
| Flexor Digitorum Brevis | Curls the lesser toes at their middle joints | Medial plantar nerve (S2–S3) |
| Flexor Digitorum Longus | Curls the toes (flexes the toe joints); Helps point the foot downward and supports the arch | Tibial nerve (S2–S3) |
| Flexor Digitorum Profundus | Bends the fingertips (DIP joints) — the only muscle that does; Helps bend the other finger joints and the wrist | Median nerve (index and middle) and ulnar nerve (ring and little), C8–T1 |
| Flexor Digitorum Superficialis | Bends the fingers at the middle joints (PIP); Helps bend the fingers at the knuckles and the wrist | Median nerve (C8–T1) |
| Flexor Hallucis Brevis | Bends the great toe at its base joint (MTP joint) | Medial plantar nerve (S1–S2) |
| Flexor Hallucis Longus | Bends the great toe — the final push-off in walking and running; Helps point the foot downward | Tibial nerve (S2–S3) |
| Flexor Pollicis Brevis | Bends the thumb at the knuckle (MCP joint) | Median nerve (recurrent branch) and ulnar nerve (deep branch) |
| Flexor Pollicis Longus | Bends the thumb tip (interphalangeal joint); Helps bend the other thumb joints | Anterior interosseous nerve (median, C8–T1) |
| Frontalis | Raises the eyebrows; Wrinkles the forehead | Facial nerve (CN VII), temporal branch |
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.