Muscles Flashcards
Epicranius (Frontalis & Occipitalis)
raise eyebrows & pull scalp posterior
Facial nerve, CN VII
Obicularis Occulii
Closes eye
Facial nerve, CN VII
Obicularis Oris
Closes lips
Facial nerve, CN VII
Zygomaticus
Raises corners of mouth
Buccinator
Compresses Cheek, assists during chewing Facial nerve, CN VII
Masseter
Elevates mandible
Trigeminal nerve, CN V
Temporalis
Elevates & retracts mandible
Trigeminal nerve, CN V
Platysma
Tenses skin of anterior neck and depresses mandible
Sternocleidomastoid Muscle ( SCM)
Unilateral action rotate&flex; Bilateral action neck flexion
Spinal accessory nerve, CN XI
Erector Spinae (iliocostalis,longissimus&spinalis)
Extend spine “I LOVE SPINE”; semispinalis is synergistic with these muscles
Rectus Abdominus
Flexes spine and trunk
External Oblique
Rotates spine & trunk
Internal Oblique
Rotates spine & trunk
Transversus Abdominus
Compresses abdominal contents
Trapezius
Elevates scapula & extend head/neck
Spinal accessory nerve, CN XI