Muscles trunk Flashcards
1
Q
Rectus abdominis
A
- Origin: pubic crest
- Insertion: Xiphoid process,
- Function: Trunk flexion
2
Q
Transversus abdominis
A
- Origin: Internal surfaces of costal cartilages of ribs 7-12,
- Insertion: pectinal line of pubis
- Function: Bilateral contraction - Compresses abdominal viscera
Unilateral contraction - Trunk rotation
2
Q
External obliques
A
- Origin: External surfaces of ribs 5-12
- Insertion: Linea alba
- Function: Trunk flexion
- Nerve Supply: Intercostal nerves
3
Q
Internal obliques
A
- Origin: Anterior two-thirds of iliac crest
- Insertion: Inferior borders of ribs 10-12,
- Function: Trunk flexion
3
Q
Quadratus lumborum
A
- Origin: Iliac crest,
- Insertion: Inferior border of rib 12,
- Function: fixes Ribs 12 during inspiration
3
Q
Spinalis capitis
A
- Origin: originates from the spinous processes of C7-T1 vertebrae
- Insertion: into the midline of the occipital bone.
- Function: extend and laterally flex the cervical and thoracic regions of the spine.
4
Q
Spinalis colli
A
- Origin: originates from the spinous processes of C7-T1 vertebrae
- Insertion: to the spinous processes of C2-C4 vertebrae.
- Function: extend and laterally flex the cervical and thoracic regions of the spine.
5
Q
Spinalis thoracis
A
- Origin: the spinous process of T11-L2 vertebrae
- Insertion:
- Function: extend and laterally flex the cervical and thoracic regions of the spine.
6
Q
Sternocleidomastoid
A
- Origin: superior part of anterior surface of manubrium sterni
- Insertion: Lateral surface of mastoid process of the temporal bone,
- Function: neck ipsilateral flexion,
6
Q
Scalene muscles - anterior
A
- Origin: anterior tubercle of transverse processes of vertebrae C3-C6
- Insertion: scalene tubercle of rib 1,
- Function: neck flexion
7
Q
Scalene muscles – medial
A
- Origin: transverse processes of C1/C2 -> C7
- Insertion: superior border of rib 1
- Function: neck lateral flexion
7
Q
Scalene muscles – posterior
A
- Origin: posterior tubercles of transverse processes of vertebrae C4-C6/C5-C7
- Insertion: external surface of rib 2
- Function: neck lateral flexion
7
Q
Semispinalis capitis
A
- Origin: Articular processes of vertebrae C4-C7,
- Insertion: Between superior and inferior nuchal lines of occipital bone
- Function: extension of head,
7
Q
Semispinalis cervicus
A
- Origin: Transverse processes of vertebrae T1-T6
- Insertion: Spinous processes of vertebrae C2-C5
- Function: Extension of head
8
Q
Splenius capitis
A
- Origin: Spinous processes of vertebrae C7-T3,
- Insertion: Lateral superior nuchal line of occipital bone,
- Function: Extends head/neck
9
Q
Longus capitus
A
- Origin: Anterior tubercles of transverse processes of C3-C6
- Insertion: Basilar part of occipital bone
- Function: head flexion;
9
Q
Longus colli
A
- Origin: Anterior tubercles of transverse processes of vertebrae
- Insertion: Anterior tubercle of vertebra
- Function: Neck flexion
10
Q
(Iliocostalis Muscle Group)
A
Iliocostalis colli (cervicis)
Iliocostalis thoracis
Iliocostalis lumborum
11
Q
(Longissimus Muscle Group)
A
Longissimus capitis
Longissimus colli (cervicis)
Longissimus Thoracis
12
Q
(Spinalis muscle group)
A
Spinalis capitis
Spinalis colli (cervicis)
Spinalis Thoracis
13
Q
Longissimus capitis
A
- Origin: transverse processes of vertebrae C4-T5
- Insertion: inserts into the mastoid process of temporal bone.
- Function: to extend and laterally flex (ipsilateral) the spine.
14
Q
Longissimus colli
A
- Origin: extends between the transverse processes of vertebrae T1-T5 and transverse processes of vertebrae C2-C6.
- Function:to extend and laterally flex (ipsilateral) the spine.
15
Q
Longissimus thoracis
A
- Origin: travels from the L1-L5 vertebrae, sacrum and posterior iliac crest until the thoracic vertebrae and inferior six ribs.
- Function: to extend and laterally flex (ipsilateral) the spine.
16
Q
Iliocostalis colli
A
- Origin: the angle of ribs 3 to 6
- Insertion: inserts into the transverse processes of vertebrae C4-C6.
- Function: extend and laterally flex (ipsilateral) the spine.
17
Iliocostalis lumborum
* Origin: lateral crest of sacrum, medial end of iliac crest and thoracolumbar fascia.
* Insertion: attaches to the angle of ribs 5-12
* Function: extend and laterally flex (ipsilateral) the spine.
17
Iliocostalis thoracis
* Origin: muscle arises from the angles of ribs 7-12
* Insertion: angles of ribs 1-6
* Function: extend and laterally flex (ipsilateral) the spine.
