All of the following muscles have parallel oriented fibers except:
Correct Answer: Tibialis anterior
Description: Ans: D. Tibialis anterior(Ref Gray's. 41/e p112, 40/e p104-105).Individual fibers of muscle are arranged either parallel or oblique to long axis of the muscle.Saorius, rectus abdominis & sternohyoid - Parallel oriented fibers.Tibialis anterior muscle - Multipennate muscle with oblique fibers. Muscles with Parallel FasciculiMuscles with Oblique FasciculiMuscles in which fasciculi are parallel to the line of pull & have greater degree of movement.Types:Quadrilateral: ThyrohyoidStrap-like: Sternohyoid & saorius Strap-like with tendinous intersections:Rectus AbdominisFusiform: Biceps brachii, digastricMuscles in which fasciculi are oblique to the line ofpull, muscle may be triangular, or pennate (feather? like) in the constructionArrangement makes muscle more powerful.Reduces range of movement.Types:Triangular: Temporalis, adductor longusdegUnipennate: Flexor pollicis longus, extensor digitorum longusdegBipennate: Rectus femoris, flexor hallucis longusdegMultipennate: Tibialis anterior, submscapularis, deltoid (acromial fibers).
Category:
Anatomy
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now