DA Soleus OD. Adductor Magnus OC Achilies Tendon O D.Fibularis Longus OE Gracilis OF. Semitendinosis

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Select the two most appropriate muscle that perform this body movement. Only select the two most appropriate answers
DA Soleus
OD. Adductor Magnus
OC Achilies Tendon
OD.Fibularis Longus
OE Gracilis
OF Semitendinosis
Transcribed Image Text:DA Soleus OD. Adductor Magnus OC Achilies Tendon OD.Fibularis Longus OE Gracilis OF Semitendinosis
Expert Solution
Step 1: Introduction:

Muscle is a delicate tissue found in many creatures. Muscle cells contain protein fibers of actin and myosin that glide past each other, creating a compression that changes both the length and the form of the cell. Muscles function to create strength and movement.

Step 2: Options:

The soleus muscle is one of the calf muscles in the posterior portion of the leg. It connects to the Achilles tendon at the heel. Helps in plantar flexion movement. Hence the first option is correct.

 

The adductor magnus is a huge triangular muscle, arranged on the middle side of the thigh. The adductor magnus is a strong adductor of the thigh, made particularly dynamic when the legs are moved from a wide spread situation to one in which the legs equal one another. The part joined to the linea aspera goes about as a horizontal rotator. The part which arrives at the medial epicondyle goes about as an middle rotator when the leg is turned outwards and flexed, and furthermore acts to broaden the hip joint. Hence the second option is incorrect.

 

Acting through the Achilles tendon, the gastrocnemius and soleus muscles cause plantar flexion of the foot at the ankle. This activity brings the underside of the foot nearer to the back of the leg. The gastrocnemius additionally flexes the leg at the knee. But it is a tendon. Hence the third option is incorrect.

 

Fibularis longus spreads from the proximal part of the fibula to the medial cuneiform and the primary metatarsal bones. It is innervated by the superficial fibular nerve (L5, S1). The primary capacity of this muscle is to deliver the plantarflexion and eversion of the foot on the ankle joint. It is one of the main muscles in plantar flexion along with soleus and gastrocnemius. Hence the fourth option is correct.

 

The gracilis muscle is the most superficial muscle on the medial side of the thigh. It is thin and flattened, wide above, slim and tightening underneath. The muscle adducts, medially rotates, horizontally turns, and flexes the hip as above, and furthermore helps in flexion of the knee. But it is not an important muscle of plantar flexion. Hence the fifth option is incorrect.

 

Semitendinosus is a fusiform muscle of the back compartment of the thigh. Alongside semimembranosus and long head of biceps femoris it involves a gathering called the hamstring muscles with which it shares these three basic highlights. They all append between the ischial tuberosity of pelvis and bones of the leg. The semitendinosus muscle on the whole with the other two muscles of the back compartment of the thigh work to reach out at the hip and flex at the knee. The semitendinosus muscle, specifically, has the additional usefulness of helping the popliteus muscle in pivoting the leg inside. But it is not an important muscle of plantar flexion. Hence the sixth option is incorrect.

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