Exam 1 Muscles

Question 1

Quadratus Lomborum (OIA)

Answer 1

O: Illiac crest

I: 12th rib, transverse lumbar vertebrae 1-4

Important for lat. lumbar mov’t and lower back health

Question 2

External oblique (action)

Answer 2

lat. flexion of vertebral column

Question 3

Internal Oblique (action)

Answer 3

rotate clockwise and counterclockwise

Question 4

Rectus abdominus (OIA)

Answer 4

O: pubic crest & symphis

I: costacarilage ribs 5-7 & xiphoid proc.

A: flexes vertebral column

Question 5

Transverse abdominis (action)

Answer 5

flatten abdominal wall

Question 6

Components of the Anterior compartment of the leg (4)

Answer 6

1. Tibialis Ant
   
   • dorsi flex. and inversion
2. Extensor hallicus longus
   
   • ext. great toe
3. Extensor digitorum longus
   
   • ext. for lateral toes

Question 7

Lat. Compartment of lower leg

Answer 7

1. Peroneous longus
   
   • evert & plantar flex
2. Peroneous brevis
   
   • evert & plantar flex
3. Peroneous tertius
   
   • evert & dorsi flex

Question 8

Posterior compartment of lower leg

Answer 8

1. Gastrocnemius (2 jt. muscle)
   
   • plantar flex & knee flex
2. Soleus
   
   • plantar flex
3. Plataris (not everyone has a plantaris)
   
   • plantar flex & knee flex

Question 9

Medial Compartment of lower leg (deep post.)

Answer 9

1. Tibialis post.
   
   • invert & plantar flex
2. Flexor hallicus longus
   
   • Flexes great tpe
3. Flexor digitorum longus
   
   • Flex 4 lat. toes

Question 10

Bicep Femoris (OIA)

Answer 10

O: tuberosity of ischeum & distal femur above lat. condyle

I: Fibular head

A: ext. hip and flex knee

Question 11

Semitendinous (OIA)

Answer 11

O: tuberosity of ischeum

I: proximal med. tibia

A: ext. hip and flex knee

Question 12

Semimembranous (OIA)

Answer 12

O: tuberosity of ischeum

I: posterior med. epicondyle of tibia

A: ext. hip and knee flex.

Question 13

Rectus Femoris (OIA)

Answer 13

O: ant. inferior iliac spine

I: tibial tuberosity via patellar tendon

A: hip flex, knee ext.

Question 14

Post Hip muscles

Answer 14

• Gluteus Max
  
  • extends hip
• Glueteus medius
  
  • abducts/medially&laterally rotates
• Gluteus minimus
  
  • abducts/medially rotates

Question 15

Hip Adductors/Groin

Answer 15

1. Adductor Longus
2. Adductor brevis
3. Adductor magnus
4. Gracilis

Question 16

Biceps Brachii (OIA)

Answer 16

O: SH-coracoid proc. of scapula

LH:supraglenoid tubercule of scapula

I: radial tuberosity

A: flex elbow, supinate forearm, flex shoulder

Question 17

Triceps Brachii (OIA)

Answer 17

O: 3 heads crosses shoulder jt

I: olecranon proc. of ulna

A: extend elbow & shoulder

Question 18

Deltoid

Answer 18

Ant. Post. and middle fibers

shoulder abuction, flexion and extension

Question 19

Pectoralis Major (OIA)

Answer 19

O: lat. sternum, costacartilage 2-6, clavicle

I: humeral shaft below greater tuberosity

A: flexion, adduction, interally rotate shoulder

Question 20

Latissimus Dorsi (OIA)

Answer 20

O: post. illiac crest, thoracic vertabrae 7-12, ribs 9-12

I: humeral shaft

A: extend, adduct, internally rotate shoulder

Question 21

Trapezius (action)

Answer 21

neck ext., adduct, internally rotate shoulder