Discussing Muscles

Muscles
Name Course Instructor Date
1 Evaluate how the name of a muscle can distinguish its location, action, shape, and function. Select five different muscles to make this distinction.
Transversus abdominis
The transversus abdominis is located in the anterior, lateral, and posterior part of the abdomen, below the minor oblique (Marieb& Smith, 2016). It is the innermost part abdomen and extends from the spine to the midline. It is an expiratory muscle that facilitates coughing, urination, defecation, and delivery. It is also necessary for the stabilization of the lumbar spine and core stabilization.
Flexor carpi muscle
Flexor carpi muscle is an appendicular muscle. The muscle is located on the ulnar side of the anterior forearm. The muscle’s action is flexion and abductionat the wrist. The origin of the muscle is the common flexor tendon. Flexor carpi muscle flexes the hand at the wrist together with other muscles.
Temporalis muscle
The temporalis muscle is a flat tissue located above the temporal bone of the cranial cavity, and that has functions related to mouth movement during the chewing process. Thismuscle raises, and the lowers jaw returning it to its position when chewing is over. The action is to elevate the mandible, and the muscle closes the mouth (Marieb& Smith, 2016).
Biceps brachii
Biceps brachii covers the anterior surface of the arm. The main function is supination of the forearm and flexion at the elbow.
Quadriceps femoris
This refers to the four knee extensors. The four-headed muscle is involved in knee extension and hip flexion.
2 Examine the principal axial muscles of the body and distinguish their origins, insertions, actions, and innervations.
Axial muscles include muscles of the head and neck, muscles of the vertebral column, oblique and rectus muscles and muscles of the pelvic floor
Name

Origin

Insertion

Action

Innervations

Muscles of facial expression

 

 

 

 

Orbicularis Oris

Maxillae and Mandible

Lips

Compresses, Closes mouth

Facial nerve (VII)

Zygomaticus (major/minor)

Zygomatic Bone

mouth

smile ©

 

Orbicularis oculi

Margin of Orbit

Eyelid

Closes eye

 

Masseter

Zygomatic Arch

Mandible

Elevates mandible

Trigeminal nerve (V), mandibular division

Temporalis

Temporal Bone

Coronoid porcess of Mandible

Elevates mandible

Trigeminal nerve (V), mandibular division

Buccinator

Maxillae and Mandible

orbicularis oris

Presses cheek inward

Facial nerve (VII)

Thoracic & shoulder muscles