Muscle Notes Test 11/22

Buccinator

Buccinator

Insertion: orbicularis oris muscle

Origin: alveolar process of mandible and maxilla

Frontalis

Insertion: skin of eyebrow and root of nose

Origin: hairline at galea aponeuritica

Masseter

Insertion: angle and lateral surface of the mandibular ramus

Origin: zygomatic arch

Orbicularis Oculi

Orbicularis Oris

Sternocleidomastoid

Temporalis

Trapezius

Zygomaticus

Deltoid

Diaphragm

Erector Spinae

External Intercostal

External Oblique

Internal Oblique

Latissimus Dorsi

Pectoralis Major

Rectus Abdominis

Transversus Abdominis

Adductors

Biceps Brachii

Biceps Femoris

Brachioradialis

Fibularis Muscles

Gastrocnemius

Gluteus Maximus

Gluteus Medius

Hamstrings

Iliopsoas

Quadriceps

Rectus Femoris

Sartorius

Semimembranosus

Semitendinosus

Soleus

Tibialis Anterior

Triceps Brachii

Fast twitch muscle

Contract faster than other muscle fibers and support short, quick burst of energy

Slow twitch muscle

Long contraction duration, associated with endurance, and have tons of blood vessels and mitochondria to support long-lasting energy

Muscle contraction

When signaled by a motor neuron, a skeletal muscle fiber contracts as the thin filaments are pulled and then slide past the thick filaments within the fiber's sarcomeres

• this process involves the interaction of actin and myosin filaments, resulting in muscle shortening and movement