Muscles Flashcards
Frontalis
Origin: Frontal Aponeurosis
Insertion: Skin of Eyebrow
Action: Raises eyebrow
Orbicularis oculi
Origin: Frontal bone and Maxilla
Insertion: Skin around eye
Action: Closes eye/squints
Orbicularis oris
Origin: Muscles near mouth
Insertion: Skin at corner of mouth
Action: Closes/puckers mouth
Masseter
Origin: Zygomatic arch
Insertion:Mandible
Action: Elevates Mandible
Temporalis
Origin: Temporal Bone
Insertion: Mandible
Action: Elevates Mandible
Sternocleidomastoid
Origin: Sternum and clavicle
Insertion: Mastoid processof temporal bone
Action: (both contracting) head to chest. (one contracts) head rotates
Zygomaticus major
Origin: Anterior zygomatic arch
Insertion: muscles around mouth
Action: Moves corners of mouth superiorly and posteriorly
Zygomaticus minor
Origin: Zygomatic bone
Insertion: Skin of the upper lip
Action: Moves corners of mouth superiorly and posteriorly
Splenius capitis
Origin: Spinous process, C7-T3
Insertion: Mastoid process
Action: Extend, rotate, laterally flex head
Rectus abdominis
Origin: Pubis
Insertion: Xiphoid process
Action:Compresses abdomen, flexes vertebral column
External oblique
Origin: Lower 8 ribs
Insertion:Iliac Crest
Action: (Both contract) compresses abdomen. (one contracts) vertebral column flexed to side.
Internal oblique
Origin: Iliac Crest
Insertion: Costal cartilages of inferior 3-4 ribs
Action: (Both contract) compresses abdomen. (one contracts) vertebral column flexed to side.
Transverse abdominus
Origin: Iliac crest,
Insertion: Xiphoid process, line alba, pubis
Action: Compresses abdomen
Trapezius
Origin: Occipital bone, vertebral spinous processes
Insertion: clavicle, scapula
Action: Elevates clavicle, adducts scapula, and extends head
Rhomboideus major
deep muscle
Origin: Vertebral spinous processes
Insertion: Scapula
Action: Adducts scapula and rotates it downwards
Serratus anterior
Origin: Ribs
Insertion: Scapula
Action: Rotates scapula upward and laterally rotates it downwards
Pectoralis minor
deep muscle
Origin: Ribs 3-5
Insertion: Corocoid of scapula
Action: Depresses and moves scapula anteriorly
Latissimus dorsi
Origin: Ribs, inferior 6 vertebral spines
Insertion: Humerus
Action: Extends and adducts arm
Infraspinatus
Origin: Scapula
Insertion: Humerus
Action: Rotates arm laterally
Subscapularis
Origin: Scapula
Insertion: Humerus
Action: Rotates humerus medially
Supraspinatus
Origin: Scapula
Insertion: Humerus
Action: Abducts arm
Teres minor
Origin: Lateral border of scapula
Insertion: Humerus
Action: Rotates arm laterally
Gluteus maximus
Origin: Iliac Crest
Insertion: Femur
Action: Extends and rotates femur laterally
Tensor fascia lata
Origin: Iliac Crest
Insertion: Tibia by way of fascia lat a
Action: Flexes and adducts femur
Adductor magnus
Origin: Pubis
Insertion: Linea aspera of femur
Action: Flexes and adducts femur
Gracilis
Origin: Pubis
Insertion: Tibia
Action: Flexes leg
Sartorius
Origin: Ilium
Insertion: Tibia
Action: Flexes leg
Quadriceps
1 - Rectus femoris
Origin: Ilium
Insertion: Patella
Action: Extends leg
Quadriceps
2 - Vastus medialis
Origin: Linea aspera of femur
Insertion: Tibia by way of patellar ligament
Action: Extends leg
Quadriceps
3 - Vastus lateralis
Origin: Femur
Insertion: Tibia by way of patellar ligament
Action: Extends leg
Quadriceps
4 - Vastus intermedius (Deep)
Origin: Femur
Insertion: Tibia by way of patellar ligament
Action: Extends leg
Hamstrings
1 - Biceps femoris
Origin: Ischium
Insertion: Tibia
Action: Flexes leg
Hamstrings
2 - Semitendinosus
Origin: Ischium
Insertion: Tibia
Action: Flexes leg
Hamstrings
3 - Semimembranosus
Origin: Ischium
Insertion: Tibia
Action: Flexes leg
Gastrocnemius
Origin: Femur
Insertion: Calcaneus by way of Achilles tendon
Action: Plantaar Flexion
Soleus
Origin: Fibula
Insertion: Calcaneus by way of Achilles tendon
Action: Plantar Flexion
Tibialis anterior
Origin: Tibia
Insertion: First Metatarsal
Action: Dorsiflexion of foot
Pectoralis major
Origin: Sternum
Insertion: Humerus
Action: Flexes and adducts arm
Teres major
Origin: Scapula
Insertion: Humerus
Action: Extends arm
Latissimus dorsi
Origin: Ribs
Insertion: Humerus
Action: Extends and adducts arm
Deltoid
Origin: Clavicle
Insertion: Humerus
Action: Abducts, flexes, and extends arm
Biceps brachii
Origin: Scapula
Insertion: Radial tuberosity
Action: Flexes forearm
Brachialis
Origin: Humerus
Insertion:Ulna
Action: Flexes forearm
Brachioradialis
Origin: Humerus
Insertion: Radius
Action: Flexes forearm
Triceps brachii
Origin: Humerus
Insertion: Olecranon of ulna
Action: Extends forearm
