Muscles Flashcards Quiz

Buccinator Muscle

• A thin, flat muscle located in the cheek area.
• Responsible for compressing the cheeks against the teeth during chewing.

Levator Scapulae

• Connects the cervical vertebrae to the scapula.
• Elevates the scapula and assists in neck movement.

Masseter Muscle

• Major muscle involved in mastication (chewing).
• Located in the jaw, it elevates the mandible to close the mouth.

Orbicularis Oculi

• Circular muscle around the eye.
• Functions to close the eyelids, aiding in blinking and squinting.

Orbicularis Oris

• Circular muscle surrounding the mouth.
• Responsible for movements such as puckering and closing the lips.

Sternocleidomastoid

• Stretches from the sternum and clavicle to the mastoid process of the skull.
• Facilitates head rotation and flexes the neck.

Bones of Muscle Origin

• Muscles may originate from the manubrium, clavicle, or sternum, depending on the muscle.

Zygomatic Major

• Located in the cheek, it elevates the corners of the mouth.
• Plays a key role in smiling and facial expressions.

Epicranius (Frontal Belly)

• Covers the frontal bone and consists of the frontal and occipital bellies.
• Responsible for raising the eyebrows and wrinkling the forehead.

Humerus

• Many muscles insert into this bone, particularly those of the upper arm.

Mandible and Maxilla

• Key bones providing origin for several facial muscles, providing structure to the jaw.

Temporalis

• A muscle that helps in closing the jaw, located above the ear.

Deltoid

• A large muscle covering the shoulder joint.
• Responsible for arm abduction, flexion, and extension.

Gluteus Minimus

• Located beneath the gluteus medius.
• Assists in hip abduction and medially rotates the thigh.

Infraspinatus

• Part of the rotator cuff, crucial for shoulder stability.
• Primarily responsible for the external rotation of the arm.

Costal Cartilage

• Connective tissue that attaches ribs to the sternum, providing elasticity to the ribcage.

Internal Oblique

• Muscle situated on each side of the abdomen.
• Involved in trunk rotation and lateral flexion.

Latissimus Dorsi

• Large muscle in the back that extends to the humerus.
• Functions in arm adduction and extension.

Longissimus

• Part of the erector spinae group responsible for extending the vertebral column.

Pectoralis Minor

• A smaller pectoral muscle that assists in shoulder movement and stabilization.

Serratus Anterior

• Located on the side of the chest; crucial for scapular protraction and rotation.

Spinous Process

• A prominent bony structure on vertebrae, serving as an attachment point for muscles.

Supraspinatus

• Another rotator cuff muscle, located above the scapula.
• Aids in shoulder abduction and stability.

Teres Major

• Located beneath the teres minor; assists in shoulder movements.

Flexion of Arm at Shoulder

• An action performed by several muscles that bend the arm at the shoulder joint.

External Intercostal

• Muscles between the ribs that elevate the rib cage during breathing.

External Oblique

• The largest muscle on the side of the abdomen; aids in trunk rotation.

Gluteus Maximus

• The largest gluteal muscle; responsible for hip extension and lateral rotation.

Gluteus Medius

• Located underneath the gluteus maximus; involved in hip stabilization and abduction.

Iliacus

• Muscle of the hip that helps flex the thigh and stabilize the pelvis.

Iliotibial Tract

• A thick band of fascia running along the outer thigh, providing stability to the knee.

Semitendinosus

• Part of the hamstring group; assists in flexing the knee and extending the hip.

Tensor Fasciae Latae

• Muscle located on the outer thigh; helps in hip flexion and abduction.

Vastus Lateralis

• Largest of the quadriceps muscles; extends the knee.

Vastus Medialis

• Another quadriceps muscle responsible for knee extension, located on the inner thigh.

Adductor Longus

• A thigh muscle responsible for adducting the thigh and aiding in hip movement.

Biceps Femoris

• Part of the hamstring group; assists in knee flexion and hip extension.

Gastrocnemius

• Major calf muscle; involved in plantarflexion of the foot.

Gracilis

• Thin muscle along the inner thigh, involved in thigh adduction.

Flexor Carpi Radialis

• A wrist muscle involved in flexion and radial deviation of the hand.

Triceps Brachii

• Major muscle of the back of the arm; responsible for elbow extension.

Palmaris Longus

• A muscle that contributes to wrist flexion and is absent in some individuals.

Pronation Teres

• Muscle involved in forearm pronation and flexion at the elbow.

Brachialis

• Lies beneath the biceps; crucial for elbow flexion.

Extensor Carpi Ulnaris

• A muscle that aids in wrist extension and ulnar deviation.

Flexor Digitorum Longus

• Responsible for flexing the toes and aiding in foot movement.

Vastus Intermedius

• Also part of the quadriceps group, located beneath the rectus femoris, aiding in knee extension.