-[A]- BiL: Elevate ribs during inhalation.
UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side.
-[O]- Trans Process C-5 & C-6 (post. tubercles)
-[I]- 2nd rib
Scalenes (medius)
-[A]- BiL: Elevate ribs during inhalation.
UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side.
-[O]- Trans Process C-2 to C-7 (post. tubercles)
-[I]- 1st rib
-[A]- BiL: Elevate ribs during inhalation.
Flex neck (ant scalene only)
UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side
-[O]- Trans Process C-3 to C-6 (ant. tubercles)
-[I]- 1st rib
Temporalis
-[A]- Elevates & retracts mandible
-[O]- Temporal fossa & fascia
-[I]- Mandible: Coronoid process
Masseter
-[A]- Elevates mandible.
UniL: moves jaw laterally to same side.
-[O]- Zygomatic arch
-[I]- Angle & ramus of mandible
Sternocleidomastoid
-[A]- UniL: Laterally flexes head to same side
Rotates head to opp. side
BiL: Flexes neck
Assists inhalation
-[O]- Sternal Head: top of manubrium
Clavicular Head: Medial 1/3 of clavicle
-[I]- Temporal: Mastiod process;
lateral superior nuchal
Occipitalis
(occipitofrontalis)
-[A]- Anchors & retracts galea posteriorly (O only)
-[O]- Galea aponeurotica (both)
-[I]- Superior nuchal line of occiput (O only)
Scalenes (posterior)
-[A]- BiL: Elevate ribs during inhalation.
UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side.
-[O]- Trans Process C-5 & C-6 (post. tubercles)
-[I]- 2nd rib
Scalenes (medius)
-[A]- BiL: Elevate ribs during inhalation.
UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side.
-[O]- Trans Process C-2 to C-7 (post. tubercles)
-[I]- 1st rib
