1 / 41

MUSCLE ORIGIN, INSERTION, AND ACTION

MUSCLE ORIGIN, INSERTION, AND ACTION. THE MUSCLULAR SYSTEM. Major Skeletal Muscles: Anterior View. The 40 superficial muscles here are divided into 10 regional areas of the body. Figure 10.4b. Major Skeletal Muscles: Posterior View.

jbyers
Download Presentation

MUSCLE ORIGIN, INSERTION, AND ACTION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MUSCLE ORIGIN, INSERTION, AND ACTION THE MUSCLULAR SYSTEM

  2. Major Skeletal Muscles: Anterior View • The 40 superficial muscles here are divided into 10 regional areas of the body Figure 10.4b

  3. Major Skeletal Muscles: Posterior View • The 27 superficial muscles here are divided into seven regional areas of the body Figure 10.5b

  4. Muscles: Name, and Action • Name and description of the muscle – be alert to information about the muscle given in the name • Origin and insertion – there is always a joint between the origin and insertion • Action– best learned by acting out a muscle’s movement on one’s own body

  5. Muscles of the Face

  6. Muscles of Mastication Figure 10.7a

  7. Frontalis: elevate eyebrows  Orbicularis Oculi: close eyelid  Zygomaticus: draw angle of lip upward  Buccinator: draws cheeks against teeth Orbicularis Oris: closes mouth  Platysma: draws lower lip down & back  Cranial Aponeurosis: connects frontalis to occipitalis Temporalis: elevates mandible Occipitalis: draws scalp back Masseter: elevates mandible Sternocleidomastoid: Flexes head Draws head toward shoulder Head & Neck Muscles

  8. Muscles of the Anterior Neck and Throat Figure 10.8a

  9. Deeper Muscles of the Neck: Anterior Figure 10.9a

  10. Deeper Muscles of the Neck: Posterior Figure 10.9b

  11. Deep Back Muscles Figure 10.9d

  12. Muscles of Respiration • The primary function of deep thoracic muscles is to promote movement for breathing • External intercostals – more superficial layer that lifts the rib cage and increases thoracic volume to allow inspiration Figure 10.10a

  13. Muscles of Respiration • Internal intercostals – deeper layer that aids in forced expiration • Diaphragm – most important muscle in inspiration Figure 10.10a

  14. Muscles of Respiration: The Diaphragm Figure 10.10b

  15. Muscles of the Abdominal Wall Figure 10.11a

  16. Muscles of the Abdominal Wall Figure 10.11b

  17. Muscles of the Abdominal Wall Figure 10.11c

  18. Extrinsic Shoulder Muscles Figure 10.13a

  19. Extrinsic Shoulder Muscles Figure 10.13b

  20. Muscles Crossing the Shoulder Figure 10.14a

  21. Muscles Crossing the Shoulder Figure 10.14d

  22. Muscles Crossing the Shoulder Figure 10.14c

  23. Muscles Crossing the Elbow Forearm extension • The triceps brachii is the prime mover of forearm extension Forearm flexion • Brachialis and biceps brachii are the chief forearm flexors • The brachioradialis acts as a synergist and helps stabilize the elbow

  24. Forearm: SuperficialAnterior Compartment • These muscles are primarily flexors of the wrist and fingers and pronators Figure 10.15a

  25. Forearm: Deeper Anterior Compartment Deep Deepest Figure 10.15b, c

  26. Forearm:SuperficialPosteriorCompartment • These muscles are primarily extensors of the wrist and fingers Figure 10.16a

  27. Forearm:DeepPosteriorCompartment • These muscles are primarily extensors of the wrist and fingers and the supinator Figure 10.16b

  28. Muscles Crossing Hip and Knee Joints Anterior compartment (most) muscles of the hip and thigh flex the femur at the hip and extend the leg at the knee • Extend the leg (anterior compartment) Posterior compartment muscles of the hip and thigh extend the thigh and flex the leg • Flex and extend the thigh (posterior compartment) Medial compartment muscles all adduct the thigh • Adduct the thigh (medial compartment) • These three groups are enclosed by the fascia lata

  29. Movements of the Thigh at the Hip: Flexion and Extension • The most important thigh flexors are the iliopsoas (prime mover), tensor fasciae latae, and rectus femoris • The medially located adductor muscles and sartorius assist in flexion

  30. Movements of the Thigh at the Hip: Flexion and Extension • Thigh extension is primarily effected by the hamstrings (biceps femoris, semitendinosus, and semimembranosus) • Forceful extension is aided by the gluteus maximus

  31. Figure 10.19a

  32. Movements of the Thigh at the Hip: Other Movements • Abduction and rotation are effected by the gluteus medius and gluteus minimus, and are antagonized by the lateral rotators • Thigh adduction is the role of five adductor muscles (adductor magnus, adductor longus, and adductor brevis; the pectineus, and the gracilis)

  33. Figure 10.20a

  34. Movements:Knee Joint • sole extensor of the knee • quadriceps femoris • flex the knee, and are antagonists to the quadriceps femoris • hamstrings Figure 10.19a

  35. Muscles of the Anterior Compartment primary toe extensors and ankle dorsiflexors • tibialis anterior • extensor digitorum longus • extensor hallucis longus • fibularis (peroneus) tertius Figure 10.21a

  36. Muscles of the Anterior Compartment ISOLATED Figure 10.21b-d

  37. Muscles of theLateral Compartment plantar flex and evert the foot • fibularis longus • fibularis brevis Figure 10.22a

  38. Muscles of the Posterior Compartment primarily flex the foot and the toes • gastrocnemius • soleus • tibialis posterior • flexor digitorum longus • flexor hallucis longus Figure 10.23a

  39. Muscles of the Posterior Compartment - DEEP Deep Figure 10.23b, c

  40. Muscles of the Posterior Compartment - DEEPEST * Deepest Figure 10.23b, c

More Related