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Muscles
Names of muscles with the action, origin, insertion and innervation
23
Anatomy
Undergraduate 2
10/13/2014

Additional Anatomy Flashcards

 


 

Cards

Term

 

 

 

 

Orbicularis Oculi

Definition

Action: Closes Eye

 

Origin: Lacrimal Bone, Frontal Bone and Maxillae

 

Insertion: Eye lids and Skin Around Eye

 

Innervation: Facial Nerve (Cranial Nerve VII)

Term

 

 

 

 

Temporalis

Definition

Action:Chewing. Extends (elevates), retracts, excursion of the mandible

 

Origin: Temporal Line

 

Insertion: Coronoid Process and Ramus of Mandible

 

Innervation: Mandibular Nerve

Term

 

 

 

 

Masseter

Definition

Action: Chewing. Extends (elevates) mandible

 

Origin: Zygomatic Arch

 

Insertion: Mandibular Ramus

 

Innervation: Mandibular Nerve

Term

 

 

 

 

Sternocleidomastoid

Definition

Action: Agonist of Neck Flexion (down). Rotates head left and right

 

Origin: Manubrium and medial portion of clavicle

 

Insertion: Mastoid Process

 

Innervation: Spinal nerves C2-C3

Term

 

 

 

 

Trapezius

Definition

Action: Extends and Hyperextends neck. Elevates shoulders

 

Origin: Occipital (external protuberance and nuchal lines). C7-T4 spinous processes.

 

Insertion: Scapula and Lateral 3rd of Clavicle

 

Innervation: Accessory spinal nerves C3-C4

Term

 

 

 

 

Diaphragm

Definition

Action: Agonist for inspiration (breathing)

 

Origin: Xyphoid Process, Rib cartilage 7-12, and Lumbar vertebrae

 

Insertion: Central Tendon of Diaphragm

 

Innervation: Phrenic nerve (at C3)

Term

 

 

 

 

External Intercostals

Definition

Action: Elevate and protract ribs; Keeps thoracic cavity from caving in

 

Origin: Inferior margin of Ribs

 

Insertion: Superior margin of Ribs

 

Innervation: Intercostal nerves

Term

 

 

 

 

Rectus Abdominus

Definition

Action: Flexion of Lumbar region of Vertebral column

 

Origin: Pubic Symphysis 

 

Insertion: Xyphoid process and ribs 7-11

 

Innervation: Spinal nerves T6-T12

Term

 

 

 

 

Erector Spinae

Definition

Action: Extension of Lumbar region and lateral Flexion of vertebral column

 

Origin: Nuchal Ligament, Ribs, Vertebrae and Sacrum

 

Insertion: Mastoid Process, Ribs and Vertebrae

 

Innervation: All spinal nerves

Term

 

 

 

 

Deltoid

Definition

Action: Flexes, Extends, Abducts, and Rotates (medially and laterally) the Humerus

 

Origin: Clavicle and Scapula

 

Insertion: Deltoid Tuberosity of Humerus

 

Innervation: Axillary nerve

Term

 

 

 

 

Pectoralis Major

Definition

Action: Flexes, Adducts and Rotates (medially) the Humerus

 

Origin: Sternum, Clavicle, and ribs 1-7

 

Insertion: Lateral Humerus

 

Innervation: Pectoral nerves

Term

 

 

 

 

Biceps Brachii

Definition

Action: Elbow Flexion and Forearm supination

 

Origin: Glenoid cavity and Coracoid process of Scapula

 

Insertion: Radial Tuberosity 

 

Innervation: Musculocutaneous nerve

Term

 

 

 

 

Triceps Brachii

Definition

Action: Extends elbow

 

Origin: Glenoid cavity and Humerus

 

Insertion: Olecranon of Ulna

 

Innervation: Radial nerve

Term

 

 

 

 

Muscles of Rotator Cuff and Function

Definition

Supraspinatus

Infraspinatus

Teres minor

Subscapularis

 

Action: Holds head of Humerus in the Glenoid cavity

Term

 

Main Forearm Extensors: 

 

Extensor carpi radialis
Extensor Digitorum

Extensor carpi ulnaris

Definition

Action: Extend the wrist and fingers

 

Origin: Lateral epicondyle of the Humerus

 

Insertion: Metacarpals and Phalanges

 

Innervation: Radial nerve and Posterior Interosseous nerve

Term

 

Main Forearm Flexors:

 

Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Definition

Action: Flexes wrist and fingers

 

Origin: Medial epicondyle of Humerus

 

Insertion: Carpals and Metacarpals

 

Innervation: Median nerve and Ulnar nerve

Term

 

 

 

 

Flexor Digitorum Superficialis

Definition

Action: Flexes wrist and finger joints

 

Origin: Medial epicondyle of Humerus, Coronoid process of the Ulna, and on the Radius

 

Insertion: Middle Phalanges II-V

 

Innervation: Median nerve

Term

 

 

 

 

Gluteus Maximus

Definition

Action: Extends thigh at the hip

 

Origin: Illiac crest, Dorsal Sacrum, and Coccyx

 

Insertion: Gluteal tuberosity of the Femur

 

Innervation: Inferior gluteal nerve

Term

 

 

 

 

Biceps Femoris

Definition

Action: Flexes knee

 

Origin: Long Head=Ischial Tuberosity

                   Short Head=Linea Aspera of Femur

 

Insertion: Head of Fibula

 

Innervation: Tibial nerve

Term

 

Quadriceps Femoris:

 

Rectus Femoris

Vastus Medialis

Vastus Lateralis

Vastus Intermedialis

Definition

Action: Extends knee

 

Origin: Illium and Proximal Femur

 

Insertion: Patella and Tibial Tuberosity

 

Innervation: Femoral nerve

Term

 

 

 

 

Tibialis Anterior

Definition

Action: Dorsiflexion (metatarsals up, heel down)

 

Origin: Lateral condyle of Tibia

 

Insertion: Medial cuneiform and Metatarsal I

 

Innervation: Deep Fibular nerve

Term

 

 

 

 

Gastrocnemius

Definition

Action: Plantar Flexion (metatarsals down, heel up)

 

Origin: Condyles of Femur

 

Insertion: Calcaneus via Calcaneal (Achilles') Tendon

 

Innervation: Tibial nerve

Term

 

 

 

 

Orbicularis Oris

Definition

Action: Closes and protrudes lips

 

Origin: Modiolus of mouth

 

Insertion: Submucosa and dermis of lips

 

Innervation: Facial nerve (Cranial nerve VII)

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