EXAM 3 Lecture 4

Appendicular Muscles

Stabilize, position, and support the limbs.

What does the axillary nerve innvervate?

Deltoid Muscle

What does the Musculocutaneous Nerve innervate?

Elbow flexors in anterior compartment of the arm.

What does the Median nerve innervate ?

The wrist and finger flexors in anterior compartment of the arm.

What does the ulnar nerve innervate?

Flexors in the anterior forearm, most small hand muscles.

What does the radial nerve innervate?

Muscles in the posterior arm and forearm.

What do superior fibers do?

Elevates scapula

What do inferior fibers do?

Depress scapula

What do the Rhomboid muscles do?

Retract scapula

What do the serratus anterior muscles do?

Protraction and upward rotation of the scapula.

What does the deltoid muscle do?

Abducts arm

What does the pectoralis major do?

Flexes, adducts and medially rotates the arm.

What does the Latissimus Dorsi do?

Extends, adducts and medially rotates the arm.

What does the teres major do?

Extends adducts and medially rotates the arm.

What do the Biceps brachii do?

Flexes and supinates forearm at the elbow joint

What does the brachialis do?

Flexes forearm at the elbow joint.

What does the triceps brachii do?

Extends forearm at elbow joint.

Carpal tunnel release

Surgery involves cutting through the flexor retinaculum.

Where do the tendons of the finger flexors and the median nerve pass through?

Carpal tunnel

What innervates the hypothenar group of the hand?

Ulnar nerve

What innervates the thenar group?

The median nerve.

What does the hypothenar group do?

Move the 5th digit (pinky finger)

What does the Thenar group do?

Moves the thumb (1st digit)

Femoral Nerve

Anterior compartment of thigh and hip flexors.

Obturator Nerve

Medial compartment of thigh (adductors)

Sciatic Nerve Branches

1. Tibial Nerve

2. Common fibular nerve

Where does the tibial Nerve innervate?

Posterior compartment of thigh, leg, foot.

Common Fibular nerve

Anterior and lateral compartments of leg and foot.

Gluteus Maximus

Major extensor of thigh; laterally rotates thigh.

Iliopsoas

Hip Flexors

Illiacus

Flexes thigh at hip joint

Psoas Major

Flexes thigh at hip joint

Rectus Femoris

Flex thigh at hip joint.

Satorius

Flex hip

What are the three muscle compartment of the thigh?

1. Anterior

2. Medial

3. Posterior

Anterior

Flex hip and extend knee

Medial

Adduct hip

Posterior

Extend hip and flex knee

Quadriceps Femoris Definition

4 muscles that form a common tendon bulling on the tibia - all extend the leg at the knee joint.

What are the four different Quadriceps Femoris?

1. Rectus femoris

2. Vastus Lateralis

3. Vastus Medialis

4. Vastus Intermedius

Rectus Femoris

Knee extension; hip flexion

Vastus Lateralis

Knee extension

Vastus medialis

knee extension.

Vastus intermedius (deep)

Knee extension

Sartorius

Flex leg at knee

Hamstrings

Extension of thigh at hip joint. Flexion of leg at knee joint.

Tibialis anterior

Dorsiflexion of the foot; inverts the foot.

Extensor digitorum longus

Extension of toes.

Fibularis Longus

Eversion of foot. Plantarflexion.

Calcaneal Tendon

Achillies Tendon