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Muscles Beginning With L
12 muscles in the reference begin with the letter L. 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 |
|---|---|---|
| Lateral Compartment of the Leg (Group) | Turn the sole outward (eversion); Support the lateral foot and arches | Superficial fibular nerve (L5–S2) |
| Lateral Pterygoid | Protrudes the jaw; Opens the mouth | Trigeminal nerve (CN V3) |
| Latissimus Dorsi | Extends the arm; Adducts the arm | Thoracodorsal nerve (C6–C8) |
| Levator Ani | Supports the pelvic organs; Resists rises in abdominal pressure | Nerve to levator ani (S4) and pudendal nerve branches |
| Levator Labii Superioris | Raises the upper lip; Deepens the nasolabial fold | Facial nerve (CN VII) |
| Levator Scapulae | Elevates the shoulder blade; Rotates the scapula downward | Dorsal scapular nerve (C5) and C3–C4 |
| Levatores Costarum | Elevate the ribs in breathing; Help rotate the spine | Dorsal rami of spinal nerves |
| Longissimus Capitis | Extends the head; Turns the face to the same side | Dorsal rami of spinal nerves |
| Longus Capitis | Flexes the head and neck | Cervical plexus, C1–C3 |
| Longus Colli | Flexes the neck; Slightly rotates the neck | Cervical spinal nerves C2–C6 |
| Lumbricals (Foot) | Bend the toes at their base joints while straightening the tip joints | Medial plantar nerve (1st) and lateral plantar nerve (2nd–4th) |
| Lumbricals (Hand) | Bend the fingers at the knuckles while straightening the middle and tip joints — the 'intrinsic plus' position | Median nerve (1st–2nd) and ulnar nerve deep branch (3rd–4th), C8–T1 |
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.