Transcript
Muscles
Muscles of the Head – Facial Expression
Muscles of the Head – Mastication and Tongue Movement
Muscles of the Neck and Vertebral Column
• Head movement• Sternocleidomastoid
Muscles of the Abdominal Wall
Muscles of the Abdominal Wall
Muscles of the Neck and Vertebral Column
Muscles of the Neck and Vertebral Column
Deep Muscles of the Thorax – Breathing
Deep Muscles of the Thorax – Breathing
Superficial Muscles of the Anterior Thorax
• Movements of the scapula• Pectoralis major
• Pectoralis minor
• Serratus anterior
• Subclavius
Superficial Muscles of the Anterior Thorax
Superficial Muscles of the Posterior Thorax
• Movements of the scapula• Trapezius
• Levator scapulae
• Rhomboid major
• Rhomboid minor
Superficial Muscles of the Posterior Thorax
Muscles Crossing the Shoulder Joint
• Movements of the arm• Deltoid
• Pectoralis major
Muscles Crossing the Shoulder Joint
• Movements of the arm• Latissimus dorsi
• Supraspinatus
• Infraspinatus
• Teres minor
• Teres major
• Coracobrachialis
• SubscapularisX
Muscles Crossing the Elbow Joint
• Posterior muscles – extensors of the forearm • Triceps brachii
• Anconeus
• Anterior muscles – flexors of the forearm• Biceps brachii – also supinates the forearm
• Brachialis
• Brachioradialis
X
Muscles of the Forearm
• Movements of the wrist, hand, and fingers• Most forearm muscles arise from the distal
humerus
• Movements at the wrist include:• Flexion, extension, abduction, and adduction
• Wrist and fingers are “operated” by muscles in the forearm
Superficial Anterior Muscles of the Forearm
• Pronator teres
• Flexor carpi radialis
• Palmaris longus
• Flexor carpi ulnaris
• Flexor digitorum superficialis
Deep Anterior Muscles of the Forearm
• Flexor pollicis longus
• Flexor digitorum profundus
• Pronator quadratus
Muscles of the Forearm
• Extensors – posterior compartment• Innervated by the radial nerve
• Originate at a common tendon• Lateral epicondyle of the humerus
Superficial Posterior Muscles of the Forearm
• Brachioradialis – flexes forearm
• Extensor carpi radialis longus
• Extensor carpi radialis brevis
• Extensor digitorum
• Extensor carpi ulnaris
Summary of Actions of the Muscles of the Arm and Forearm
Summary of Actions of the Muscles of the Arm and Forearm
Muscles Crossing the Hip and Knee Joints
Anterior muscles• Flex the thigh and extend the leg at the knee
• Posterior muscles • Extend the thigh and flex the leg
• Adductor muscles – on medial aspect of thigh• Adduct the thigh only
Muscles Crossing the Hip and Knee Joints
• Movements at the hip joint• Muscles that flex the thigh
• Originate on vertebral column or pelvis
• Muscles that extend the thigh• Arise posterior to the hip joint
• Adductors originate medial to the hip joint
• Abductors originate lateral to the hip joint
Anterior and Medial Muscles
• Origin on pelvis or vertebral column• Iliacus • Psoas major• Sartorius
• Muscles of the medial compartment• Adductor longus• Adductor brevis• Adductor magnus• Pectineus • Gracilis
Anterior and Medial Muscles
Muscles of the Anterior Compartment of the Thigh
• Quadriceps femoris – four separate heads • Have a common insertion at the quadriceps tendon
• Powerful knee extensors• Rectus femoris
• Vastus lateralis
• Vastus medialis
• Vastus intermedius
• Tensor fasciae latae
Muscles of the Anterior Compartment of the Thigh
Figure 11.19a
Posterior Muscles
• Origin on pelvis or sacrum• Gluteus maximus• Gluteus medius• Gluteus minimus
• Lateral rotators• Piriformis• Obturator externus• Obturator internus• Superior and inferior gemellus• Quadratus femoris
Muscles of the Posterior Compartment of the Thigh
• Hamstrings
• Biceps femoris
• Semitendinosus
• Semimembranosus
Muscles of the Anterior Compartment
Muscles of the Lateral Compartment
Muscles of the Posterior Compartment
Summary of Actions of Muscles of the Thigh and Leg
Summary of Actions of Muscles of the Thigh and Leg
top related