Examlex
Which of the following types of muscle fiber is spindle shaped without stripes or striations?
Ischiocavernosus
A muscle that helps stiffen the penis or clitoris during sexual arousal by compressing the base of the erectile tissues.
Semispinalis Thoracis
A muscle in the back that extends from the thoracic vertebrae to the base of the skull, helping in the extension and rotation of the spine.
Multifidus
A muscle located in the spine that stabilizes the vertebrae and assists with spinal movements.
Quadratus Lumborum
A deep muscle in the lower back that helps with the stabilization of the pelvis and the spine, as well as aiding in lateral movement of the torso.
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