Each time when I commute with BART to San Francisco State University, I put on my sound cancelling headphones to block out the screeching sounds of the wheels scrapping against the rails and listen to the superb pod cast, Hidden Brain. This podcast is hosted by NPR social science correspondent Shankar Vedantam and links research from psychology and neurobiology with findings from economics, anthropology, and sociology, among other field
It uses science and storytelling to reveal the unconscious patterns that drive human behavior, and the biases that shape our choices (text adapted from: Hidden Brain.
I continue to be surprised by the remarkable knowledge presented in a storytelling format that is “a conversation about life’s unseen patterns.” As I listen, the commute time disappears and I have a front row seat to an outstanding podcast.
The blog has been adapted from our published article, Harvey, R., Peper, E., Booiman, A., Heredia Cedillo, A., & Villagomez, E. (2018). The effect of head and neck position on head rotation, cervical muscle tension and symptoms. Biofeedback. 46(3), 65–71.
Why is it so difficult to turn your head to see what is behind you?
How come so many people feel pressure in the back of the head or have headaches after working on the computer?
Your mother may have been right when she said, “Sit up straight! Don’t slouch!” Sitting slouched and collapsed is the new norm as digital devices force us to slouch or tilt our head downward. Sometimes we scrunch our neck to look at the laptop screen or cellphone. This collapsed position also contributes to an increased in musculoskeletal dysfunction (Nahar & Sayed, 2018). The more you use a screen for digital tasks, the more you tend to have head-forward posture, especially when the screens are small (Kang, Park, Lee, Kim, Yoon, & Jung, 2012). In addition, the less time children play outside and the more time young children watch the screen, the more likely will they become near sighted and need to have their vision corrected (Sherwin et al, 2012). In addition, the collapsed head forward position unintentionally decreases subjective energy level and may amplify defeated, helpless, hopeless thoughts and memories (Bader, 2015; Peper & Lin, 2012; Tsai, Peper, & Lin, 2016; Peper et al, 2017).
Explore the following two exercises to experience how the head forward position immediately limits head rotation and how neck scrunching can rapidly induce back of the head pressure and headaches.
Exercise 1. Effect of head forward position on neck rotation
Sit at the edge of the chair and bring your head forward, then rotate your head to the right and to the left and observe how far you can rotate. Then sit erect with the crown of the head reaching towards the ceiling and again rotate your head from right to left and observe how far you can rotate as shown in Figure 1.
Figure 1. Head-erect versus head-forward position.
What did you experience?
Most likely your experience is similar to the 87 students (Mean Age = 23.6 years) who participated in this classroom activity designed to bring awareness of the effect of head and neck position on symptoms of muscle tension. 92.0% of the students reported that is was much easier to rotate their head and could rotate further during the head-erect position as compared to the head-forward position (see Figure 2).
Figure 2. Self-report of ease of head rotation.
What does this mean?
Almost all participants were surprised that the head forward position restricted head rotation as well as reduced peripheral awareness (Fernandez-de-Las-Penas et al., 2006). The collapsed head forward may directly affect personal safety; since, it reduces peripheral awareness while walking, biking or driving a car. In addition, when the head is forward, the cervical vertebrae are in a more curved position compared to the erect head with the normal cervical curve (Kang et al., 2012). This means that in the head-forward position, the pressure on the vertebrae and the intervertebral disc is elevated compared to the preferred position with a stretched neck. This increases the risk of damage to the vertebrae and intervertebral disc (Kang et al, 2012). It also means that the muscles that hold the head in the forward position have to work much harder.
Be aware that of factors that contribute to a head-forward position.
- Sitting in a car seat in which the headrest pushes the head forward. Solutions: Tilt the headrest back or put pillow in your back from your shoulders to your pelvis to move your body slightly forward.
- If you wear a bun or ponytail, the headrest (car, airplane seat, or chair) will often push your head forward. This causes a change of the head to a more forward position and it becomes a habit without the person even knowing it. Solution: Place a pillow in your back to move your body forward or loosen the bun or ponytail.
- Difficulty reading the text on the digital screen. The person automatically cranes their head forward to read the text. Solutions: Have your eyes checked and, if necessary, wear computer-reading glasses; alternatively, increase the font size and reduce glare.
- Working on a laptop and looking down on the screen. Solutions: Detachable keyboard and laptop on a stand to raise screen to eye level as shown in Figure 3.
Figure 3. Trying to read the laptop screen, which causes the head to go forward as compared to raising the screen and using an external keyboard. Reproduced by permission from www.backshop.nl
- Being tired or exhausted encourages the body to collapse and slouch and increases the muscle tension in the upper cervical region. You can explore the effect of tiredness that causes slouching and head-forward position during the day by observing the following if you drive a car.
In the morning, adjust your rear mirror and side mirrors. Then at the end of the day when you sit in the car, you may note that you may need to readjust your inside rear mirror. No, the mirror didn’t change of position during the day by itself—you slouched unknowingly. Solutions: Take many breaks during the day to regenerate, install stretch break reminders, or wear an UpRight Go posture feedback device to remind you when you begin to slouch (Peper, Lin & Harvey, 2017).
Exercise 2: Effect of neck scrunching on symptom development
Sit comfortably and your nose forward and slightly. While the head is forward tighten your neck as if your squeezing the back of the head downward into the shoulders and hold this contracted neck position for 20 seconds. Let go and relax.
What did you experience?
Most likely your experience was similar to 98.4% of the 125 college students who reported a rapid increase in discomfort after neck scrunching as shown in Figure 4.
Figure 4. Symptoms induced by 30 seconds of neck scrunching.
During scrunching there was a significant increase in the cervical and trapezius sEMG activity recorded from 12 volunteers as shown in Figure 5.Figure 5. Change in cervical and trapezius sEMG during head forward and neck scrunching.
What does this mean?
Nearly all participants were surprised that 30 seconds of neck scrunching would rapidly increase induce discomfort and cause symptoms. This experience provided motivation to identify situations that evoked neck scrunching and avoid those situations or change the ergonomics that induced the neck scrunching. If you experience headaches or neck discomfort, scrunching could be a contributing factor.
Factors that contribute to neck scrunching and discomfort.
- Bringing your head forward to see the text or graphics more clearly. There may be multiple causes such as blurred vision, tiny text font size, small screen and ergonomic factors. Possible solutions. Have your eyes checked and if appropriate wear computer-reading glasses. Increase the text font size or use a large digital screen. Reduce glare and place the screen at the appropriate height so that the top of the screen is no higher than your eyebrows.
- Immobility and working in static position for too long a time period. Possible solutions. Interrupt your static position with movements every few minutes such as stretching, standing, and wiggling.
These two experiential practices are “symptom prescription practices” that may help you become aware that head position contributes to symptoms development. For example, if you suffer from headaches or neck and backaches from computer work, check your posture and make sure your head is aligned on top of your neck–as if held by an invisible thread from the ceiling and take many movement breaks.The awareness may help you to identify situations that cause these dysfunctional body patterns that could cause symptoms. By inhibiting these head and neck patterns, you may be able to reduce or avoid discomfort. Just as a picture is worth a thousand words, self-experience through feeling and seeing is believing.
Bader, E. E. (2015). The Psychology and Neurobiology of Mediation. Cardozo J. Conflict Resolution, 17, 363.
Fernandez-de-Las-Penas, C., Alonso-Blanco, C., Cuadrado, M. L., & Pareja, J. A. (2006). Forward head posture and neck mobility in chronic tension-type headache: A blinded, controlled study. Cephalalgia, 26(3), 314-319.
Kang, J. H., Park, R. Y., Lee, S. J., Kim, J. Y., Yoon, S. R., & Jung, K. I. (2012). The effect of the forward head posture on postural balance in long time computer based worker. Annals of rehabilitation medicine, 36(1), 98-104.
Lee, M. Y., Lee, H. Y., & Yong, M. S. (2014). Characteristics of cervical position sense in subjects with forward head posture. Journal of physical therapy science, 26(11), 1741-1743. https://doi.org/10.1589/jpts.26.1741
Nahar, S., & Sayed, A. (2018). Prevalence of musculoskeletal dysfunction in computer science students and analysis of workstation characteristics-an explorative study. International Journal of Advanced Research in Computer Science, 9(2), 21-27. https://doi.org/10.26483/ijarcs.v9i2.5570
Peper, E., & Lin, I. M. (2012). Increase or decrease depression: How body postures influence your energy level. Biofeedback, 40(3), 125-130
Peper, E., Lin, I-M., Harvey, R., & Perez, J. (2017). How posture affects memory recall and mood. Biofeedback.45 (2), 36-41.
Peper, E., Lin, I-M, & Harvey, R. (2017). Posture and mood: Implications and applications to therapy. Biofeedback.35(2), 42-48.
Sherwin, J.C., Reacher, M.H., Keogh, R.H., Khawaja, A.P, Mackey, D.A., & Foster, P.J. (2012). The Association between Time Spent Outdoors and Myopia in Children and Adolescents: A Systematic Review and Meta-analysis. Ophthalmology, 119(10), 2141-2151. https://doi.org/10.1016/j.ophtha.2012.04.020
Tsai, H. Y., Peper, E., & Lin, I. M. (2016). EEG patterns under positive/negative body postures and emotion recall tasks. NeuroRegulation, 3(1), 23-27.
*This blog was adapted from our published article, The blog has been adapted from our research article, Harvey, R., Peper, E., Booiman, A., Heredia Cedillo, A., & Villagomez, E. (2018). The effect of head and neck position on head rotation, cervical muscle tension and symptoms. Biofeedback. 46(3), 65–71.