Muscle Actions: Body Segment and Joint Flashcards
Head: TMJ
Depression (Open mouth)
- Lateral pterygoid
- suprahyoid
- infrahyoid
Head: TMJ
Elevation (close mouth)
- temporalis
- masseter
- medial pterygoid
Head: TMJ
Protrusion
- masseter
- medial/lateral pterygoid
Head: TMJ
Retrustion
- temporalis
- masseter
- digastric
Head: TMJ
Side to side
- medial/lateral pterygoid
- masseter
- temporalis
Spine: Cervical Intervertebral Joints
Flexion
- SCM
- Longus colli
- Scalenus mm’s
Spine: Cervical Intervertebral Joints
Flexion
- SCM
- Longus colli
- Scalenus mm’s
Spine: Cervical Intervertebral Joints
Extension
- Splenius cervicis
- semispinalis cervicis
- longissimus cervicis
- multifidus
- trapezius
Spine: Cervical Intervertebral Joints
Rotation/Lateral Bending
- SCM
- Scalenus
- splenius cervicis
- longissimus cervicis
- iliocostalis cervicis
- levator scap
- multifidus
Spine: Thoracic and Lumbar Intervertebral Joints
Flexion
- Rectus abdominis
- internal obliques
- external obliques
Spine: Thoracic and Lumbar Intervertebral Joints
Extension
- erector spinae
- QL
- multifidus
Spine: Thoracic and Lumbar Intervertebral Joints
Rotation and Lateral Bending
- psoas major
- QL
- external/internal obliques
- multifidus
- longissimus thoracis
- iliocostalis thoracis
- rotatores
Upper Extremity: Scapula
Elevation
- upper trpz
- levator scap
Upper Extremity: Scapula
Depression
- lats
- pec major/minor
- lower trpz
Upper Extremity: Scapula
Protraction
- serratus ant.
- pec minor
Upper Extremity: Scapula
Retraction
- middle trpz
- rhomboids
Upper Extremity: Scapula
Upward rotation
- Upper/Lower trpz
- serratus ant.
Upper Extremity: Scapula
Downward rotation
- rhomboids
- levator scap
- pec minor
Upper Extremity: Shoulder Joint
Flexion
- Ant delts
- coracobrachialis
- pec major (clavicular head)
- biceps brachii
Upper Extremity: Shoulder Joint
Extension
- Lats
- post. delts
- teres major (“little lat”)
- triceps brachii (long head)
Upper Extremity: Shoulder Joint
ABduction
- middle delts
- supraspinatus
Upper Extremity: Shoulder Joint
ADduction
- pec major
- lats
- teres major (little lat)
Upper Extremity: Shoulder Joint
Horizontal ABduction
- post. delts
- infraspinatus
- teres minor