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Muscles
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Muscles 700 skeletal muscles For each muscle: Name Location Origin
Insertion Movement
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Organization of Muscle Fibers
Parallel Muscles Fascicles = parallel to long axis of muscle When contracted:
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Organization of Muscle Fibers
Convergent Muscles Fibers are spread over a large area, but come together at a common site Fibers all pull in separate directions
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Organization of Muscle Fibers
Pennate Muscles Fascicles form common angle with tendon Unipennate – Bipennate – Multipennate -
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Organization of Muscle Fibers
Circular Muscles Fibers are concentrically arranged around an opening When muscle contracts –
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Muscle Terminology Origin – Insertion – Action – Gastrocnemius
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Muscle Terminology Actions 2 methods: Bones affected Joints affected
Almost all originate or insert on skeleton 2 methods: Bones affected Joints affected
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Muscle Terminology Agonist – contraction is responsible for movement
Biceps brachii – Antagonist – Triceps brachii - Synergist – helps agonist Most useful at start of contraction
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Muscle Terminology Fascicle Organization Rectus - Tranverse -
Oblique – Location Temporalis - Brachialis - Gluteus - Glossus -
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Muscle Terminology Relative Position Structural Features
Superficialis , externus– Internus, profundus – Extrinsic – Intrinsic – Structural Features Biceps – Triceps – Quadriceps –
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Muscle Terminology Shape Length Size Trapezius - Deltoid -
Rhomboidus - Orbicularis - Length Longus, teres – Brevis – Size Maximus, major - Minimus, minor -
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Muscle Terminology Origin and Insertion Function Association
Sacrospinalis – Sternocleidomastoid – Function Extensor/flexor - Supinator - Adductor - Association Sartoris – Buccinator –
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Define origin and insertion.
Name the origin and insertion of the styloglossus. What action does the flexor carpi ulnaris perform?
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Former Canadian Prime Minister Jean Chrétien acquired Bell's palsy in his youth which never resolved
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Muscles of the Head Orbicularis oris Orbicularis oculi Location Origin
Insertion Movement Orbicularis oculi
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Muscles of the Head Buccinator Masseter Location Origin Insertion
Movement Masseter
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Muscles of the Head Temporalis Zygomaticus major Location Origin
Insertion Movement Zygomaticus major
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Muscles of the Head Risorius Frontalis Location Origin Insertion
Movement Frontalis
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Muscles of the Head Platysma Location Origin Insertion Movement
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Muscles of the Neck Sternocleidomastoid Hyoid Location Origin
Insertion Movement Hyoid
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1. Where does the temporalis muscle insert?
2. What movement is the orbicularis oris responsible for? 3. What movement is the orbicularis oculi responsible for? 4. Where does the buccinator originate?
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Abdominal Muscles Transversus Abdominis Rectus Abdominis Location
Origin Insertion Movement Rectus Abdominis
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Abdominal Muscles Internal Oblique External Oblique Location Origin
Insertion Movement External Oblique
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Ribcage Muscles Internal Intercostals External Intercostals Location
Origin Insertion Movement External Intercostals
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Ribcage Muscles Diaphragm Location Origin Insertion Movement
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Which layer of abdominal muscle is the most internal?
What is the movement of the rectus abdominus muscles? What is the origin of the sternocleidomastoid muscle? Which muscle depresses the jaw?
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Muscles of the Leg Gluteus Maximus Gluteus Medius Location Origin
Insertion Movement Gluteus Medius
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Muscles of the Leg Gluteus Minimus Location Origin Insertion Movement
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Muscles of the Leg Semimembranosus Semitendinosus Location Origin
Insertion Movement Semitendinosus
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Muscles of the Leg Biceps femoris Location Origin Insertion Movement
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Muscles of the Leg Gracilis Adductor brevis Location Origin Insertion
Movement Adductor brevis
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Muscles of the Leg Adductor longus Adductor magnus Location Origin
Insertion Movement Adductor magnus
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Muscles of the Leg Sartorius Rectus femoris Location Origin Insertion
Movement Rectus femoris
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Muscles of the Leg Vastus lateralis Vastus medialis Location Origin
Insertion Movement Vastus medialis
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Muscles of the Leg Vastus intermedias Location Origin Insertion
Movement
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Muscles of the Leg Tibialis anterior Location Origin Insertion
Movement 37
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Muscles of the Leg Soleus Gastrocnemius Location Origin Insertion
Movement Gastrocnemius
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Muscles of the Back Trapezius Rhomboids Location Origin Insertion
Movement Rhomboids
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Muscles of the Back Levator scapulae Pectoralis minor Location Origin
Insertion Movement Pectoralis minor
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Muscles of the Back Serratus anterior Location Origin Insertion
Movement
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Muscles Acting on the Shoulder
Teres Major Location Origin Insertion Movement Deltoid
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Muscles Acting on the Shoulder
Pectoralis major Location Origin Insertion Movement Latissimus dorsi
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Muscles Acting on the Forearm
Biceps brachii Location Origin Insertion Movement Brachialis
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Muscles Acting on the Forearm
Triceps brachii Location Origin Insertion Movement
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Muscles Acting on the Forearm
Flexors + palmaris longus Location Origin Insertion Movement Extensors
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