Muscles of the face and mastication

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UPPER MUSCLES
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Muscles of the face and mastication

• Masseter
• Action - Elevates mandible
• Temporalis
• Action - Elevates mandible

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Muscles of the anterior triangle of the neck

• Digastric
• Action -Elevates hyoid bone
• Mylohyoid
• Action -Elevates hyoid bone
• Sternohyoid
• Action - Depresses hyoid bone and hence larynx
• Sternothyroid
• Action - Depresses larynx
• Thyrohyoid
• Action - Elevates larynx or depresses hyoid
  bone
• Sternocleidomastoid
• Action - Flexes and laterally rotates cervical
  spine.

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Muscles of the anterior triangle of the neck
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Muscles that act on the scapula

• Clavo-trapezius
• Action - Elevates and rotates scapula
• Acromio-trapezius
• Action - Adducts scapula
• Spinotrapezius
• Action - Depress scapula
• Pectoralis Minor
• Action - Depress scapula
• Levator scapulae
• Action - Elevate scapula
• Serratus Anterior
• Action - Anterior rotation of scapula
• 7. Rhomboideus
• Action - Adducts scapula

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Muscles that act on the scapula
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Muscles that act on the arm

• Pectoralis Major
• Action - Flex and adducts humerus
• Clavo-deltoid
• Action - Flex humerus
• Acromio-deltoid
• Action - Abduct humerus
• Spino-deltoid
• Action - Extend humerus
• Infraspinatus
• Action - Lateral rotation humerus
• Supraspinatus
• Action - Abduct humerus
• Subscapularis
• Action - Medial rotation humerus
• Latissimus dorsi
• Action - Adduct humerus
• Teres Major
• Action - Adduct humerus

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Muscles that act on the arm
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Muscles that act on the forearm (radius
and ulna)

• 1. Triceps Brachii
• Action - Extend forearm
• 2. Biceps Brachii
• Action - Flex forearm
• 3. Brachialis
• Action - Flex forearm
• 4. Brachioradialis
• Action - Flex forearm
• 5. Pronator Teres
• Action - Pronation
• 6. Supinator
• Action - Supination

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Muscles that act on the forearm (radius
and ulna)
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Muscles that act on the wrists, hands and fingers

• Extensor Carpi radialis longus
• Action - Extend wrist
• Extensor Carpi radialis brevis
• Action - Extend wrist
• Extensor Carpi ulnaris
• Action - Extend wrist
• Extensor Digitorum
• Action - Extend fingers
• Extensor Digiti Minimi
• Action - Extends 5th digit
• Flexor Carpi Radialis
• Action - Flex wrist
• Flexor Carpi Ulnaris
• Action - Flex wrist

8. Palmaris Longus Action - Flex wrist 9.
Flexor Digitorum Profundus Action - Flex
fingertips 10. Flexor Digitorum
Superficialis Action - Flex middle phalanges
11. Abductor Pollicis Brevis Action -
Abduct thumb
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Muscles that act on the wrists, hands and fingers