Human Anatomy: 2100 Exam 3

What do the anterolateral neck muscles do?

flex the head and/or neck

What do the posterior neck muscles do?

extend head and/or neck

Where do the head and neck muscles arise from?

vertebrae, thoracic cage, and pectoral girdle

Where do the head and neck muscles attach?

cranial bones

Erector spinae

muscles help determine posture

Bilateral contraction

extends vertebral column

Unilateral contraction

flexes vertebral column towards active muscles

Erector spinae are organized into __ groups of muscles

three

Iliocostalis

more lateral group; composed of cervical, thoracic, and lumbar parts

Longissimus

composed of capitis, cervical, and thoracic parts

Spinalis

most medial group; attach to spinous processes of vertebrae; composed of cervical and thoracic parts