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Muscles Beginning With P
19 muscles in the reference begin with the letter P. 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 |
|---|---|---|
| Palmar Interossei (Hand) | Bring the fingers together toward the middle finger (adduction) — 'PAD' | Ulnar nerve, deep branch (C8–T1) |
| Palmaris Brevis | Wrinkles the skin over the hypothenar eminence; Deepens the hollow of the palm | Ulnar nerve, superficial branch |
| Palmaris Longus | Bends the wrist weakly; Tenses the palm's fascia | Median nerve (C7–C8) |
| Pectineus | Brings the thigh toward the midline (adduction); Flexes the thigh | Femoral nerve (L2–L4), sometimes obturator nerve |
| Pectoralis Major | Adducts the arm; Rotates the arm inward | Lateral and medial pectoral nerves (C5–T1) |
| Pectoralis Major (Clavicular Head) | Flexes the arm forward; Adducts and inwardly rotates the arm | Lateral pectoral nerve (C5–C7) |
| Pectoralis Minor | Pulls the shoulder blade forward and down; Lifts the ribs in forced breathing in | Medial pectoral nerve (C8–T1) |
| Piriformis | Rotates the thigh outward; Moves the thigh away from the midline when the hip is flexed | Nerve to piriformis (S1–S2) |
| Plantar Interossei (Foot) | Bring the toes together toward the second toe | Lateral plantar nerve (S2–S3) |
| Plantar Intrinsic Muscles (Overview) | Fine toe control, arch support and balance on the forefoot | Medial and lateral plantar nerves (S1–S3) |
| Plantaris | Weakly points the foot downward; Weakly bends the knee | Tibial nerve (S1–S2) |
| Platysma | Tenses the skin of the neck; Pulls the corners of the mouth down | Facial nerve (CN VII), cervical branch |
| Popliteus | Unlocks the knee by rotating the leg outward on the femur; Begins knee flexion | Tibial nerve (L4–S1) |
| Procerus | Pulls the skin between the eyebrows down; Makes a horizontal wrinkle across the nose bridge | Facial nerve (CN VII) |
| Pronator Quadratus | Turns the forearm palm-down (the main pronator for slow, unloaded movement) | Anterior interosseous nerve (median, C8–T1) |
| Pronator Teres | Turns the forearm palm-down (pronation); Helps bend the elbow | Median nerve (C6–C7) |
| Psoas Major | Flexes the thigh at the hip; Flexes the trunk when the thigh is fixed | Ventral rami of L1–L3 |
| Psoas Minor | Weakly flexes the lumbar spine; Tenses the iliac fascia | Ventral ramus of L1 |
| Pyramidalis | Tenses the linea alba | Subcostal nerve (T12) |
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.