What is the back view of the deep muscles?

This rear view of the deep muscles shows skeletal muscles from the head to the feet. They hold the head and back upright, keep the shoulders steady, pull the arms back, straighten the thighs, bend the knees, and point the toes down.

Occipitofrontalis

This muscle stretches from the frontal bone to the occipital bone at the back of the skull. Occipitofrontalis is a long and wide muscle of the scalp, spanning from the eyebrows to the superior nuchal lines of occipital bones. Together with temporoparietalis, it comprises the epicranial group of the muscles of facial expression.

Rhomboid muscles

These diamond-shaped muscles pull the shoulders back towards the spine. It helps connect the shoulder blades to the rib cage and spine. It also helps you maintain good posture.

Rhomboid pain is felt under the neck between the shoulder blades and spine. It’s sometimes referred to as shoulder blade pain or upper back pain.

Infraspinatus

This muscle helps to stablilize the shoulder joint and rotate the arm outwards.  It arises mostly from the infraspinous fossa of scapula, and connects it to the proximal humerus. 

Serratus anterior

This muscle helps to stabilize the shoulder blade. The serratus anterior muscle is a fan-shaped muscle at the lateral wall of the thorax. Its main part lies deep under the scapula and the pectoral muscles. It is easy to palpate between the pectoralis major and latissimus dorsi muscles. In athletic bodies the muscle may be even visible to the naked eye along the ribs underneath the axilla.

Serratus posterior inferior

This muscle has a jagged edge, which attaches to the ribs. The serratus posterior muscles extend obliquely from the vertebral column to the rib cage. The main function of these muscles is to facilitate the act of respiration; the serratus posterior superior muscle elevates the ribs, while the serratus posterior inferior muscle depresses the ribs. These actions are particularly important in forced respiration.

Medial head of triceps brachii

This deep part of the triceps brachii muscle straightens the elbow. The medial head of the Triceps brachii arises from inferior two thirds of humerus to insert, along with the other two heads of the triceps, on the olecranon of the ulna.

Erector spinae

This muscle group supports the spine. They extend on either side of the vertebral column, between the base of the cranium superiorly and pelvis inferiorly. 

Transverses abdominis

This helps to stabilize the pelvis and lower back when moving. Along with the external abdominal oblique and the internal abdominal oblique, it comprises the lateral abdominal muscles. Combined with the two anterior abdominal muscles (rectus abdominis and pyramidalis), these muscles make up the anterolateral abdominal wall.

Extensor carpi ulnaris

This muscle helps to straighten the wrist. This muscle belongs to the superficial forearm extensor group, along with anconeus, brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum and extensor digiti minimi muscles.

Gluetus medius

A pair of muscles keeps the pelvis level when you are walking. Gluteus medius is a large fan-shaped muscle located in the posterior hip, extending from the ilium to the proximal femur. Together with the gluteus maximus, gluteus minimus and tensor fasciae latae muscles, it belongs to the muscles of the gluteal region.

Adductor compartment of the thigh

The adductor magnus is the largest muscle in the medial compartment. It lies posteriorly to the other muscles.

Functionally, the muscle can be divided into two parts; the adductor part, and the hamstring part.

Semimemvranosus

This muscle is one of the hamstrings, which bend the knee. Semimembranosus is one of four posterior thigh muscles that are responsible for extending the hip. The other three muscles that belong to the hip extensor group are semitendinosus, biceps femoris and gluteus maximus. 

Popliteus

This muscle helps with bending the knee. The popliteus muscle is a small muscle that forms the floor of the popliteal fossa. It belongs to the deep posterior leg muscles, along with tibialis posterior, flexor digitorum longus and flexor hallucis longus.

Flexor hallucis longus

This muscle bends the big toe. Flexor hallucis longus muscle is a powerful muscle that comprises the deep layer of the posterior compartment of the leg. It belongs to a group called the deep flexors of the calf, which also include popliteus, flexor digitorum longus and tibialis posterior muscles.

 

Picture Credit : Google