The layer of tissue over the skull is also known as the epicranial aponeurosis, or galea aponeurotica.
This structure includes the frontal muscle and connective tissue forming the aponeurosis. With age, all tissues in the body undergo changes, including the muscular-aponeurotic layer. Because the aponeurosis connects the muscles, reduced mobility in this area can contribute to tension and restriction, affecting blood circulation and lymphatic drainage. This may be associated with a range of complaints, from headaches to visible signs of ageing.
The aponeurosis often becomes less mobile with age — on average after the age of 35, when tissues begin to lose elasticity and firmness. This is why scalp massage techniques may vary depending on the client’s age. For example, younger clients may be offered gentle palpating movements that lightly mobilise the aponeurosis, while older clients may receive deeper tissue work aimed at moving a scalp that has become less mobile.
There are also factors that may contribute to reduced mobility of the aponeurosis earlier in life. Stress, for example, can affect surrounding tissues even at a young age. Without going deeply into biochemistry, prolonged stress may influence immune function, skin-cell resilience and metabolism, and may also affect glucose and fatty-acid levels and blood viscosity.
The soft tissues of the scalp have a rich blood supply due to numerous vessels. Their walls are closely connected with the connective-tissue septa linking the skin to the aponeurosis. A sedentary lifestyle, sleep disruption and dietary factors may also influence the condition of the skin, muscles and lymphatic system as a whole, contributing to oxidative stress and changes in the skin’s microcirculation. Tissues may become stiffer and less elastic, while the production of surface lipids, collagen and elastin may decrease.
During physical or psycho-emotional tension, as well as in some neurological or spinal conditions, blood supply to the brain and the skin structures of the scalp may be affected. The cranial aponeurosis also plays an important role in the condition and nutrition of the scalp tissues.
The condition of the aponeurotic tissues can influence appearance. For example, when posture is habitually slouched, tension in the occipital portion of the occipitofrontalis muscle may affect the aponeurosis and the frontal muscle. This can contribute to visible changes in the upper third of the face, including forehead lines, lowering of the brow line and loss of facial tone. Reduced mobility of the aponeurosis is also sometimes associated with puffiness and a duller complexion because of impaired lymphatic drainage and circulation.
Changes in scalp mobility and circulation may also be associated with slower hair growth, thinning or hair loss if hair follicles receive less oxygen and nutrients. Conversely, one small study published in 2016 examined nine Japanese men who received daily scalp massage for 24 weeks and reported an increase in hair thickness. Another survey published in 2019 found that 69% of respondents with androgenetic alopecia reported positive changes after short scalp-massage sessions performed twice a day.
Massage should be approached comprehensively, working not only with the scalp but also with the face, décolleté and neck. Blood vessels involved in circulation pass through the neck, and muscle tension in this area can affect nerve fibres and the surrounding tissues. For this reason, working only with the scalp while the neck remains tense and restricted may be less effective.
From an aesthetic point of view, changes in the muscles that form part of the aponeurotic layer can also be important. Increased tone in the frontal muscle with age may contribute to horizontal forehead lines and vertical lines between the eyebrows.
For this reason, aesthetic treatments often focus on relaxing the frontal muscle. In some cosmetic practices, botulinum toxin injections are used to reduce muscle activity, soften existing lines and, when appropriate, slightly raise the eyebrows.
Professional scalp massage differs considerably from self-massage at home. A practitioner selects the pressure individually and works not only with the aponeurosis but also with adjacent muscles, including the frontal, temporal, masseter and sternocleidomastoid muscles.
