Lab practical 2 - Definitions

What is the nerve and action of the Frontalis

Nerve - Facial nerve

Action - Elevates eyebrows

What is the nerve and action of the Orbicularis oculi

Nerve - Facial nerve

Action - Closes the eyes

What is the nerve and action of the Orbicularis oris

Nerve - Facial nerve

Action - Closes and protrudes lips

What is the nerve and action of the Temporalis

Nerve - Mandibular nerve

Action - Elevates the mandible

What is the nerve and action of the Trapezius

Nerve -Accessory nerve

Action -Extends the head and Elevates, retracts, and depresses  the scapula

What is the nerve and action of the Diaphragm

Nerve -Phrenic nerve

Action -Lowers floor of thoracic cavity for inspiration

What is the nerve and action of the Rectus abdominis

Nerve -Branches of anterior rami of the lower six to seven thoracic nerves

Action -Flexes trunk

What is the nerve and action of the Pectoralis major

Nerve -Medial and lateral pectoral nerves

Action -Flexes, adducts, and rotates the arm

What is the nerve and action of the Deltoid

Nerve -Axillary nerve

Action -Abducts arm

What is the nerve and action of the Triceps brachi

Nerve -Radial nerve

Action -Extends forearm

What is the nerve and action of the Biceps brachii

Nerve -Musculocutaneous nerve

Action -Supinates and flexes forearm

What is the nerve and action of the Rectus femoris

Nerve -Femoral nerve

Action -Extends leg; flexes thigh

What is the nerve and action of the Vastus medialis & lateralis

Nerve -Femoral nerve

Action -Extends leg

What is the nerve and action of the Gluteus maximus

Nerve -Inferior gluteal nerve

Action -Extends, rotates, abducts thigh

What is the nerve and action of the Tibialis anterior

Nerve -Deep fibular nerve

Action -Dorsiflexes, inverts foot

What is the nerve and action of the Gastrocnemius

Nerve -Tibial nerve

Action -Plantar flexes foot; flexes leg