Muscles & Terminology (Practical 2)
✅✅ Elevates eyebrows
Occipitofrontalis (front belly)-
Location: frontal bone
✅✅ Pulls scalp posteriorly
Occipitofrontalis (occipital belly)-
Location: occipital bone
Zygomaticus- ✅✅ Raises lateral corners of mouth (smile)
Location: top of cheek, corners of mouth
Mentalis- ✅✅ Wrinkles chin (lower lip pout)
Location: bottom of chin
Orbicularis oris-✅✅ Closes lips
Location: lips, around mouth
Buccinator- ✅✅ Compresses cheek (whistling, sucking)
Location: lower/middle cheek
Orbicularis oculi-✅✅ Closes eyes
Location: around eyes
Platysma- ✅✅ Tenses skin of neck
Location: anterior neck
Lateral rectus- ✅✅ Lateral eye movement (abduction)
Location: lateral quadrant of eye
Medial rectus- ✅✅ Medial eye movement (adduction)
Location: medial quadrant of eye
, Superior rectus-✅✅ Elevation, medial eye movement (adduction)
Location: upper quadrant of eye
✅✅
Inferior rectus- Depression, medial eye movement (adduction)
Location: bottom quadrant of eye
✅✅
Inferior oblique- Elevation, lateral eye movement (abduction)
Location: anterior, bottom quadrant of eye
Superior oblique-✅✅ Depression, lateral eye movement (abduction)
Location: anterior, upper quadrant of eye
Masseter- ✅✅ Elevation of mandible
Location: back of mandible, cheek
Temporalis-✅✅ Elevation, retraction of mandible
Location: temporal bone
✅✅
Digastric- Depression of mandible
Location: follows mandible curvature; connects to skull, hyoid, back of chin
Mylohyoid- ✅✅ Elevation of hyoid (during swallowing)
Location: connects hyoid, mandible
Omohyoid- ✅✅ Depression of hyoid (during swallowing)
Location: follows neck curvature; connects hyoid to scapula
Sternohyoid- ✅✅ Depression of hyoid (during swallowing)
Location: follows neck curvature; connects hyoid to sternum
Scalenes- ✅✅ Flexion, rotation of neck; Elevation of ribs 1,2
Location: connects cervical spine to ribs 1,2
Sternocleidmastoid- ✅✅ Flexion of neck (bilateral); Contralateral rotation
of neck (unilateral)
✅✅ Elevates eyebrows
Occipitofrontalis (front belly)-
Location: frontal bone
✅✅ Pulls scalp posteriorly
Occipitofrontalis (occipital belly)-
Location: occipital bone
Zygomaticus- ✅✅ Raises lateral corners of mouth (smile)
Location: top of cheek, corners of mouth
Mentalis- ✅✅ Wrinkles chin (lower lip pout)
Location: bottom of chin
Orbicularis oris-✅✅ Closes lips
Location: lips, around mouth
Buccinator- ✅✅ Compresses cheek (whistling, sucking)
Location: lower/middle cheek
Orbicularis oculi-✅✅ Closes eyes
Location: around eyes
Platysma- ✅✅ Tenses skin of neck
Location: anterior neck
Lateral rectus- ✅✅ Lateral eye movement (abduction)
Location: lateral quadrant of eye
Medial rectus- ✅✅ Medial eye movement (adduction)
Location: medial quadrant of eye
, Superior rectus-✅✅ Elevation, medial eye movement (adduction)
Location: upper quadrant of eye
✅✅
Inferior rectus- Depression, medial eye movement (adduction)
Location: bottom quadrant of eye
✅✅
Inferior oblique- Elevation, lateral eye movement (abduction)
Location: anterior, bottom quadrant of eye
Superior oblique-✅✅ Depression, lateral eye movement (abduction)
Location: anterior, upper quadrant of eye
Masseter- ✅✅ Elevation of mandible
Location: back of mandible, cheek
Temporalis-✅✅ Elevation, retraction of mandible
Location: temporal bone
✅✅
Digastric- Depression of mandible
Location: follows mandible curvature; connects to skull, hyoid, back of chin
Mylohyoid- ✅✅ Elevation of hyoid (during swallowing)
Location: connects hyoid, mandible
Omohyoid- ✅✅ Depression of hyoid (during swallowing)
Location: follows neck curvature; connects hyoid to scapula
Sternohyoid- ✅✅ Depression of hyoid (during swallowing)
Location: follows neck curvature; connects hyoid to sternum
Scalenes- ✅✅ Flexion, rotation of neck; Elevation of ribs 1,2
Location: connects cervical spine to ribs 1,2
Sternocleidmastoid- ✅✅ Flexion of neck (bilateral); Contralateral rotation
of neck (unilateral)
