It is composed of trapezius, latissimus dorsi, rhomboid major, rhomboid minor and levator scapulae. It is innervated by anterior rami of spinal nerves, reflecting its embryological origin outside the back. Intermediate group
The intermediate group is also known as respiratory group as it may serve a respiratory function. It is composed of serratus posterior superior and serratus posterior inferior. Like the superficial group, it is innervated by anterior rami of spinal nerves. Deep group
The deep group, also known as the intrinsic group due to its embryological origin in the back, can be further subdivided into four groups:

Spinotransversales - composed of splenius capitis and splenius cervicis. Erector spinae - composed of iliocostalis, longissismus and spinalis
Transversospinales - composed of semispinalis, multifidus and rotatores
Segmental muscles - composed of levatores costarum, interspinales and intertransversariiThe deep group is innervated by the posterior rami of spinal nerves. Organs near the back
The lungs are within the ribcage, and extend to the back of the ribcage making it possible for them to be listened into through the back. The kidneys are situated beneath the muscles in the area below the end of the ribcage, loosely connected to the peritoneum. A strike to the lower back can damage the kidneys of the person being hit. Surface of the back
The skin of the human back is thicker and has fewer nerve endings than the skin on any other part of the torso. With some notable exceptions (see, e.g. George "The Animal" Steele), it tends to have less hair than the chest on men.
It is often difficult to determine if the specific phobia of fear of flight should be the primary diagnosis, or if fear of flying is a symptom of a generalized anxiety disorder or another anxiety disorder such as agoraphobia or claustrophobia. Classification
Fear of flying is a specific phobia classified as such in the DSM-5. Management
Acute anxiety caused by flying can be treated with anti-anxiety medication. The condition can be treated with exposure therapy, including use of virtual reality equipment, which works better when combined with cognitive behavioral therapy. Relaxation techniques and education about aviation safety can also be helpful in combination with other approaches.A new and advanced treatment for aviophobia is virtual reality exposure therapy. This type of treatment uses computer technology where the patient enters a virtual reality of flying. Virtual reality exposure therapy
Effective treatment for phobias such as fear of flying would be one that activates and modifies the fear structure. Activation of the fear structure can be achieved by exposing the patient to the feared stimuli, flying in this case, to elicit the fearful response. Modification of the fear structure can be achieved by the processes of habituation and extinction after eliciting the fearful response several times. A new and advanced treatment for aviophobia is virtual reality exposure therapy (VRET). This type of treatment uses computer technology where the patient virtually experiences flying. This experience includes visual, auditory, and motion stimuli to imitate flying in a plane as close as possible. Thus, VRET is considered an effective treatment for aviophobia.