Diaphragm Sternocleidomastoid Scalenes Intercostals Abdominals. The following inspiratory muscles are ONLY active during vocal projection for speech (check all that apply)

Answer 1

Among the muscles listed, the diaphragm and intercostals are primarily involved in inspiration, while the sternocleidomastoid, scalenes, and abdominals are not directly involved in respiratory function. However, during vocal projection for speech, the following muscles from the list may be involved:

1.      Diaphragm: The diaphragm is the primary muscle of respiration, contracting and flattening during inspiration to increase the volume of the thoracic cavity. It plays a significant role in controlling airflow during speech production.

2.      Intercostals: The intercostal muscles are located between the ribs and assist in expanding the thoracic cavity during inspiration. They help elevate and lower the ribs, aiding in the process of inhalation during speech.

While the other muscles listed (sternocleidomastoid, scalenes, and abdominals) are not directly involved in inspiration during speech production, they may contribute indirectly to speech articulation, posture, or other related functions.

It's important to note that the process of vocal projection for speech involves a complex coordination of multiple muscles, including those involved in respiration, phonation (sound production), and articulation.