Essentials of Muscle Mechanics Quiz

The correct answer provides the accurate attachments of the Transverse Abdominis muscle, while the incorrect answers provide different structures that are not associated with this muscle.

The Psoas muscle is responsible for flexion of the thigh at the coxal joint and flexion at the trunk at the coxal joint. It does not perform functions such as extension, rotation, abduction, or adduction.

The iliacus muscle is responsible for flexion of the thigh at the coxal joint and flexion at the trunk at the coxal joint.

The question refers to the anatomy and actions associated with the Deltoid muscle, which is located in the shoulder region. The correct answer is Deltoid, as it is responsible for various movements such as abduction, flexion, extension, medial & lateral rotation, stabilize, horizontal adduction & abduction.

The Trapezius muscle attaches to Ligamentum Nuchae, External Occipital Protuberance, Nucal line, and the Spinous process C7-T12, with the Insertion points being the Spine of Scapula, Acromion process, and Clavicle. Its actions include extension, lateral flexion, rotation to the opposite side, adduction, elevation, depression, and upward rotation of the scapula.

The Rhomboid Major originates from the spinous processes of T2-T5 and inserts into the medial border of the scapula, while the Rhomboid Minor originates from the spinous processes of C7-T1 and inserts into the upper medial border of the scapula. Their actions include adduction, elevation, and downward rotation of the scapula.

The Levator Scapula muscle attaches to the Traverse Process C1-C4 and is responsible for various movements including elevation, downward rotation, lateral flexion, rotation, and extension of the scapula.

The Rotator Cuff is composed of the SITS muscles: Supraspinatus, Infraspinatus, Teres Minor, and Subscapularis, which play a crucial role in stabilizing the shoulder joint.

The correct answer provides the specific details of the supraspinatus muscle, including its origin (O) at the supraspinous fossa, insertion (I) at the greater tubercle, and action (A) of abduction and stabilization. The incorrect answers provide details of other muscles and their origins, insertions, and actions to emphasize the distinction and test knowledge of musculoskeletal anatomy.

The infraspinatus muscle is responsible for stabilizing the shoulder joint, facilitating lateral rotation, and aiding in adduction movements.

The Teres Minor muscle originates from the lateral border of the scapula, while the other three options originate from different areas of the scapula.

The Subscapularis muscle is responsible for stabilizing and medially rotating the shoulder, not for shoulder abduction, lateral rotation, or elbow extension.

Isometric contractions occur when the muscle generates tension without changing length or causing joint movement. In concentric contractions, the muscle shortens to move a load, while in eccentric contractions, the muscle lengthens while generating force. Isotonic contractions involve constant tension with variable muscle length.

Isotonic muscle contraction involves joint movement, whereas isometric contraction involves no joint movement. Isokinetic contraction refers to a constant speed contraction, and Auxotonic contraction involves varying tension levels in the muscle.

Concentric muscle contraction occurs when the muscle shortens as it contracts. Eccentric contraction occurs when the muscle lengthens as it contracts. Isometric contraction occurs when the muscle contracts but does not change length. Isokinetic contraction occurs at a constant speed against a type of resistance.

In an eccentric contraction, the muscle lengthens as it contracts. This is in contrast to concentric contractions, where the muscle shortens as it contracts, and isometric contractions, where the muscle length remains constant during the contraction.

The correct answer is 'Temporomandibular' because the joint between the jaw and the skull is known as the temporomandibular joint, where movements like depression, elevation, protraction, and retraction are possible.

The sternocleidomastoid muscle crosses the cervical joint and allows for rotation, flexion, lateral flexion, and extension of the head at the cervical joint.

The correct joint crossed by TEMPORALISO is the Temporomandibular joint, as it involves the mandible and temporal bone.

The OCCIPITOFRONTALISO muscle does not cross any joint, it is involved in raising the eyebrows and wrinkling the forehead.

The SCALENESO muscle crosses the Cervical joint. It is responsible for various movements such as rotation, flexion, lateral flexion, and extension.

The SPINALIS- Erector Spinae Group crosses the Cervical joint, allowing for various movements such as Flexion, Extension, Lateral Flexion, and Rotation.

The LONGISSIMUS- Erector Spinae Group crosses the Cervical joint allowing for movements such as flexion, extension, lateral flexion, and rotation.

ILIOCOSTALIS-Erector Spinae Group crosses the Cervical joint, allowing for Flexion, Extension, Lateral Flexion, and Rotation.

Quadratus Lumborum muscle crosses the Vertebral Column joint to perform lateral flexion and extension of the trunk at the vertebral column on the same side.